MXPA98003368A - Accommodation for ace filter - Google Patents

Abstract

The present invention relates to an oil filter unit for use in a motor, the oil filter unit comprises a housing having a removable cover and supporting or supporting a filter cartridge, the housing comprising: a plate shell embossed and thin-walled metal having both open ends, a base end of the shell is rolled inwardly over a cylindrical flange of a shell plate to form a stiffened mounting base through the base plate of the shell, one end of the shell closure is rolled out on a cylindrical flange of a threaded metal ring to form a locking end of the shell stiffened by the threaded ring, the rolled-out edge forms a shell flange located with respect to the threaded ring for interconnected with a package, the cover is dimensioned to close the closing end and has an internally threaded portion adapted a to fit the threaded ring, so as to secure the cover to the shell, the filter cartridge is insertable into the shell and carries a suspended package adapted to fit over the flange of the shell and remain in position on the flange of the shell , as the cover is placed on the shell and rotates towards a position

Description

ACCOMMODATION FOR OIL FILTER FIELD OF THE INVENTION This invention relates to filters and, more particularly, to an oil filter system employing a thin sheet metal housing and utilizing a disposable filter cartridge.

BACKGROUND OF THE INVENTION The lubrication system of the standard internal combustion engine requires periodic service many times a year. The service includes changing the lubricating oil and also changing the filter. Most high-quality lubrication systems currently in use employ bolt-on and disposable oil filters but these can create a waste problem. In the early days of the filters, it was common to use cartridge-type oil filters that fit into a removable housing. The housing was removed from the oil filter mounted on the machine, the cartridge was removed from the housing, the housing was cleaned, a new cartridge was installed and the housing with the new cartridge was replenished or repositioned in the engine. Filter cartridges of that type usually included a cellulose filter medium and a tube of P1199 / 98MX central support, usually made of metal mesh or expandable metal. Frequently, these cartridges also included an exterior metal support. The metal supports, and particularly the central tube (or the outer casing), were necessary to prevent the filter from being crushed by the pressure generated in the lubricant to be filtered. The differential pressures of oil in an automotive hydraulic system can rise substantially at the start of the engine and, particularly, during failures, such as malfunctioning by clogged filter (due, for example, to water or an excess of engine worn metals in the oil) and, it can reach 200 psi or more. The most modern cars have migrated to the screwed filter. While the bolt-on filter is usually more expensive and, it creates a larger waste problem, the simplicity of removing an old filter and, then screwing a new one into place to propel the industry in that direction. The bolt-on filter has not only the typical cellulose filter elements, but also has an external shell made of metal foil, a central support tube, a threaded base plate and all the necessary structure to hold the filter in place and prevent it from being crushed . After use, the entire screw-in filter, the metal shell and the rest must P1199 / 98MX discarded. Environmental regulations, the limited availability of sanitary landfills and increased public awareness regarding landfill contamination have created the need for a type oil filter that can be disposed of safely in an environmentally acceptable way . These factors have made the screw-type canister filter less desirable, because they have a significant metallic content, along with the content of paper, packaging content and residual oil. Considering again the previous use of the disposable filter cartridges with permanent housings, these also have disadvantages, because their use was normally accompanied by the use of permanent housings of the previous type, which normally had the concept of bolt or central screw. The cartridge filter housings of the past were made either of embedded steel or cast aluminum (usually a few were cast iron). The pre-drawn steel housings normally used a type of shell and bolt construction that used a. packing between the housing and the lid and another between the central screw and the lid. In the past, there were some laundry designs that used a P1199 / 98MX cast housing where the housing was threaded providing a means to attach or connect the cover to the housing and eliminating the central screw and its accompanying packaging. The problem with the casting concept is that it is expensive compared to inlay steel - which naturally results in a higher cost of material due to the thickness of the walls required when casting aluminum or iron. The cost factor caused most of the high-volume cartridge designs to be of the shell and screw (2-pack) concept. The central screw was normally used because it was difficult or costly to make cast rope on the outside of an embedded steel housing and, in the embossed steel coupling cover. The use of two gaskets in the shell and screw design made the filter changes a little more complicated. An undesirable feature of the cartridge filters of the past (the shell and screw type) was that the cartridge provided two loose packages, the largest packing to be installed in a groove between the cartridge housing cover and the housing and , the smallest packing to be placed between the flange on the central screw and the lid. The large diameter loose packing tended to be a little smaller in cross section and larger in diameter and usually P1199 / 98MX was provided wrapped around the cartridge as it was shipped from the filter factory. The small diameter packaging was susceptible to falling and getting lost due to its small size. In addition, large diameter loose packing was susceptible to deformation before installation (it was often deformed when removed from the box) thus making installation difficult. Another problem was the untrained personnel who changed the filter cartridges and who did not know exactly where to fit the loose packaging and, in addition to having the difficulty of observing the area where they fit, due to confined, tight or narrow places and relatively inaccessible where the filter was placed. The two packages had an additional problem, that an unconscious mechanic (or the person making the oil change) could choose not to install one or both of the new gaskets when changing the cartridge and, just use the old gaskets again, almost thereby ensuring leakage problems. The large deformed packaging, the likelihood that the mechanic will again use the old packaging, the likelihood of the packing falling and getting lost and the tightness or. narrow spaces for the filters usually require a trained specialist and consents to change the cartridge filters, with the P1199 / 98MX in order to make them leak proof. The bolt-on filter simplified the filter change situation by eliminating the problems of loose packing, adjusting deformed packings in the grooves, the drop and loss of the packages and the probability of reusing packages. The bolt-on filter eliminated many leakage problems associated with old cartridge filters. In this way, the cartridge filters of the past had many problems, mainly installation and leaks, which the present invention aims to solve.

SUMMARY OF THE INVENTION In view of the foregoing, it is a general object of the present invention to provide a permanent housing for a disposable filter cartridge which is mainly made of embossed steel and is thus economical and lightweight. In this regard, an additional object is to eliminate the central screw of the old designs, thus simplifying filter change problems and eliminating leakage problems, due to the many problems mentioned above. Another objective is to design a filter cartridge that only has one package which must be changed with the cartridge. A further objective of the invention is P1199 / 98MX make it impossible to reuse an old package with the cartridge, and make the installation of the only package that will be changed fail-proof without requiring a visual or tactile search for a groove in which to place the package and , also eliminate the problem of the deformed packaging of the previous designs. An object of the present invention is to provide a filter system for an internal combustion engine having the ability to use a disposable filter cartridge and, in which the main components of the housing are mounted on the machine as if they had been manufactured as original equipment. More detailed objects in accordance with that aspect of the invention are combining with a shell in a filter of the appropriate type the components to stiffen the shell and make it truly a part of the engine itself. In a more detailed aspect, an object is to provide this filter system in which the housing includes permanent central tubes to support unsupported filter cartridges in some way. Our applications filed concurrently with the United States Nos. 08 / 575,515 and 08 / 575,833, describe and claim a filter system and P1199 / 98MX an environmentally friendly filter cartridge for said filter system which focuses on the waste problem. In accordance with such disclosures or exposures, many of the filter elements that had been discarded in the past can now be permanent parts of the filter housing. The filter cartridge is configured to remove metal parts, such as support tubes and, only use filter cartridge materials that can be disposed of in a sanitary landfill or incinerated. In connection with this filter cartridge, it is an object to provide a permanent housing configured of modern stiffened metal sheet components to make them permanent and reusable throughout the life of the engine. Other objects and advantages will be apparent with reference to the following detailed description when taken in conjunction with the drawings in which: BRIEF DESCRIPTION OF THE DRAWINGS FIGURES FIG. 1 is an exploded perspective showing a first embodiment of a filter system constructed in accordance with the present invention; Figure 2 is a cross-sectional view of the filter of Figure 1 shown to the filter system in P1199 / 98MX an armed or assembled relationship; Figure 3 is an enlarged partial view illustrating the interface between the filter and the associated motor; Figure 4 is a partial enlarged view showing the axial seal at the cover end of the filter; Figure 5 is an enlarged fragmentary perspective showing the interconnection between the threaded ring in the filter housing and the metal foil shell; Figure 6 is a fragmentary sectional view taken along line 6-6 of Figure 4 also showing the interrelation between the metal foil shell and the threaded ring; Figure 7 is a cross-sectional view of a second embodiment of the present invention showing a filter system having two filter elements, often referred to as a double-flow filter; Figure 8 is an enlarged partial view showing the connection between the filter of Figure 7 and a motor; Figure 9 is a plan view taken along line 9-9 of Figure 8 showing the configuration of the motor necessary to assemble the filter P1199 / 98MX oil of Figure 8. While the invention is susceptible to various modifications and alternative constructions, certain illustrated embodiments thereof will be shown in the drawings which will be described later in detail. However, it should be understood that there is no intent to limit the invention to the specific forms presented but, on the contrary, the intention is to cover all modifications, alternative constructions and equivalents that fall within the spirit and scope of the invention.

DESCRIPTION OF THE PREFERRED MODALITIES As shown in the drawings, for purposes of illustration, the invention has been embodied in a filtration system 20 exemplified as an oil filtration system for an internal combustion engine.

Figure 1 shows the filter system 20 in a perspective and exploded view including three main groupings, a set of components 21 mounted on the engine, a replaceable filter cartridge 22 and a cover unit 23. At 300 schematically illustrates an internal combustion engine and, it will be noted that the components 21 mounted on the engine are fixedly secured or secured to the engine 300. The cartridge P1199 / 98MX filter 22 is inserted into housing 21, cover 23 is placed on the open end after the filter cartridge has been inserted and rotated until the housing is in its closed and secured state. The motor can then be operated and the oil flows through the housing 21 to be filtered by the cartridge filter 22. In more detail and, referring concurrently to Figures 1 and 2, it will be noted that 300 is illustrated in diagrammatically an engine block having mounted therein a filter housing 302 having an internal chamber sized to accept a filter cartridge 310. With the filter cartridge 310 inserted in place, it is placed on top and tightened to the housing 302 a cover 311. When it is desired to change the filter, only the cover 311 needs to be removed and, the filter cartridge 310 is then removed from the housing 302. The housing 302 forms, in effect, a fixed part of the motor. In accordance with the invention and, as will be described below, the housing 302 is primarily a sheet metal member, which avoids the need for large castings but has adapted structural elements that make the metal sheet housing permanent and very rigid. In the preferred practice of the invention, the P1199 / 98MX housing has a permanent internal support tube 303 and the filter cartridge 310 is not supported. In this way, when the filter 310 is placed on the permanent central tube 303, the radial support is provided to prevent the radial crushing loads from affecting the unsupported filter medium. As described in more detail below, the packing arrangement associated with the filter cartridge protects the filter end caps from the high pressure normally observed at the outer periphery thereof. As a result, the filter 310 is positioned to avoid the axial crushing loads and, of course, the axial forces imposed on the medium of filter elements that tend to be stress loads instead of compression loads. The cover 311 is secured on a threaded retainer 304 such that the threads 313, permanently located in the housing 302, engage the internal threads 312 to allow the cover to be screwed and secured to the housing. Referring briefly to Figure 3, the summary elements of an engine mounting area that can be machined very simply to include one or more hollow openings 322 for the access input flow of the filter, an opening, are shown in partially schematic form. central 321 for the outflow of P1199 / 98MX oil to the motor and a tapped or threaded hole in the opening 321 to secure the filter unit thereto. A special configuration screw 324 having therein a central opening 325 is provided to allow oil to pass through the screw, while the screw secures the housing to the engine block. A gasket 326 with barbed posts 327, which fits within the openings 328 in the base plate 301, provides for proper sealing of the filter housing to the engine block. The housing 326 of the housing motor provides a pair of sealing rings 326a, 326b that fluidly connect the opening 322 of the motor block with an inlet port 340 in the base plate 301. An anti-rotation pin is provided (FIG. ) secured to the base plate 301 and fitting within a hollow opening in the motor housing to prevent rotation of the filter housing once it is properly installed in the motor. The base plate 301 provides a cylindrical channel between the packing rings 326a, 326b which communicates with a plurality of ports in the base plate, of which only one is shown, to direct the flow of oil past the flow diverter 341 to a chamber 342 between the inner periphery of the shell 305 and the periphery P1199 / 98MX external filter element 310. In order to facilitate the manufacture, the base plate 301 is configured as a two-piece cast, preferably die-cast aluminum, consisting of a lower section 301a, attached to the upper section 301b, the sections will preferably be joined by adjustments under pressure or by gluing. As will be better seen in Figure 2, the permanent central tube 303 is secured in the opening of the base plate 301, particularly in the section 301b of the base plate. The central tube 303 can be made of performable plastic but preferably is made of preformed aluminum and is secured to the appropriate cylindrical groove, for example by gluing. The manner in which the shell 305 is fixed to the base plate 301 in order to rule the housing is of importance. First of all, it will be appreciated that the shell is preferably a thin-walled seamless pipe formed by stuffing. In the preferred embodiment, the housing is made of steel with a wall thickness of approximately 0.050 inches. Two sausage operations are used to form the two diameter portions of the shell 305 illustrated in Figure 2, a first operation to form the smaller diameter section 305a and a separate sausage operation for P1199 / 98MX form the largest diameter section 305b. The end of the can is removed, creating open ends at both axial ends of the shell. At the base end, below the point illustrated at 360, the metal foil shell is wrapped around a flange 361 of the end plate 301. The flange 361 may have several small apertures therein, one of which is illustrated in FIG. 361a, so that the metal foil can be stamped into the openings to form indentations in the opening 361a to prevent the shell from rotating in the flange. The flange 361 of the base plate 301 is a continuous cylindrical flange (with the exception of the openings 361a), so that the rolled edge 360 is in a tight engagement with the flange around the entire periphery thereof. A hoop or a round package of square cross section 363 placed in a slot 363a of the base plate 301 seals the housing against leakage beyond the flange. The smaller diameter section 305a of the shell 305 closely fits the outer diameter of the base 301 with the compressed seal ring 363, after which the shell is wound on the flange 361 to secure these elements. . By virtue of the strength and stiffness of the cast flange 301 the base portion of the shell is stiffened substantially. The tab 361 on the base plate 301 has a P1199 / 98MX "protrusion" on the end. The shell 305 is formed on this "protrusion" to provide axial fixation of the shell to the base plate. There are a plurality of holes 361a in the base plate just below the "protrusion". In the shell these holes are stamped in order to fix the shell to the base plate from the point of view of torsion. The connection of the cover 311 with the shell 305 imposes axial and torsional loads on the shell. The aforementioned "protuberance" and the cold forging of holes in the shell resist the loads imposed from the joint of the cover. A stiffness similar to the open end (or "lock") of the shell 305 is provided by an additional cast member comprising a threaded ring 304. In Figure 5 it will be noted that the threaded ring 304 also has an annular flange 380 over which an end portion 381 of the shell 305 is wound to form a shoulder 378. The rolled edge is continuous around the periphery of the shell. As will be appreciated from Figure 1 and, as illustrated in more detail in Figure 5, in a plurality of angular positions around the threaded ring 304, a plurality of depressions 382 are formed which provide a segmented opening in the rope 311 and also an indented section 383 in the outer portion of the flange 380. According to P1199 / 98MX will observe in Figure 5, after the end 381 is rolled over the flange 313, the shell is cold-forged at 384 to closely conform to the depressions 383. Figure 6 provides a further view of the indentation 384 formed at the shell 305 in the depression section 383 to form an anti-rotation feature that affixes the threaded ring 304 in a fixed angular position on the shell 305. By virtue of carrying out the cold forging operation in a plurality of locations around the the periphery of the ring 304, the ring is fixed securely to the shell, not only in the axial direction but also rotationally. It will be appreciated that the cover is threaded onto the ring 313 and that there are occasions when a torque or excessive torque is likely to be applied to the cover, with the possibility of rotating the ring with respect to the shell. However, by virtue of the cold-forged connections of the anti-rotation type just described, the ring is secured in an anti-rotation direction to the shell, preventing damage to this mechanism. In this way, the ring, which, like the base plate is a cast member, provides rigidity to the open end of the housing formed by the metal foil shell 305. It also provides a reliable cast metal thread adapted to adjust with the internal threaded section of the cover, P1199 / 98MX also cast, to provide the strength and reliability of a completely cast unit, but at a substantially reduced weight and a substantially reduced cost. While a housing constructed in accordance with the present invention can be used with conventionally supported filter cartridges, which carry their own central support tube and, suitable conventional packing arrangements for such filter cartridges can be used, it is preferred to use a disposable filter cartridge as described in the aforementioned copending applications. When an unsupported filter cartridge is used, it is preferred to package this filter cartridge in accordance with the aforementioned applications, so as to avoid axial compressive loads on the filter medium. Thus, as illustrated in Figure 2, the base plate 301 includes a cylindrical flange 330 dimensioned to engage a flat surface 331 of a radial seal 332. The radial seal has a rounded tip or peak 333 to facilitate the insertion of filter element in the housing. A flow diverter 341 at the inlet port biases the flow to an external cylindrical chamber 342, while avoiding the occurrence or direct touch on the interface 343 between the tip or peak P1199 / 98 X 333 of the radial seal and the flange 332 of the housing. A high pressure zone in the outer cylindrical chamber 342 carries the flow to an area of lower pressure LP in the central cylindrical chamber 345 within the permanent central tube 346. By virtue of the radial seal packing 332 located in the outer periphery of the cartridge filter, the end cap 349 is protected against the higher HP pressure that appears on the external peripheral and is exposed only to the lower LP pressure that is present inside the filter media. In this way, it will be noted that the upper surface 348 of the end cap 349 is in a chamber connected to the LP region in the central tube. As such, there is no high pressure applied to the end cap which is capable of imposing an axial compressive force on the filter media. Of course, the high pressure acts only against the external surface 332 of the axial seal, causing the flattened portion 331 to press against the cylindrical flange 330 and seal against it. Moving to the other end packing, while a similar radial seal can be provided, we used an axial seal to seal between the cover and the housing. At the interface 371 low pressure is allowed on the downstream side of the filter. The differential pressure creates a force that pushes the end cap P1199 / 98MX 370 against cover 311. This does not create a problem since the cover and the threads on the cover are strong enough to withstand this force. This thrust of the cartridge against the cover means that there will always be a gap between the end of the radial seal 333 and the flow diverter 341. However, this is necessary in order to ensure that the package 376 is compressed when the cover is twisted or it is rotated on the housing and the cartridge is not providing the axial resistance to tightening the cover. If this were allowed to occur, the package 376 may not be sufficiently compressed and the filter could leak. It is important to note that flange 375 also carries a housing 376 that is adapted to automatically position itself and provide a housing seal when the cover is secured to the shell. In this way, the package 376 is suspended around the outer periphery of the filter means and in a position such that, when the filter cartridge 22 is inserted into the housing 21, the package 376 will come into contact with the rolled edge 378 of the armor 305. Additionally, when the cover 311 is placed on the shell 305 and rotated in the tightening direction, the package 376 is compressed between the surfaces 377, 378. It is also worthwhile P1199 / 9B X Note that carrying a suspended package as taught in the present embodiment makes the filter cartridge unidirectional 22. The cartridge will fit in the housing only in one direction, since the suspended package is too large for the opening of the accommodation. In this way, the unit is virtually error-proof since the cartridge can only be inserted into one shape and the package 376 is automatically placed when the cover is put in place. By joining the package 376 to the cartridge, it is impossible for the mechanic to reuse an old package or to drop it and lose the package. It also prevents packaging from deforming when it is packaged or when it is stored. All the geometry of the housing and the cartridge and the integral packaging automatically place the cartridge in the appropriate place for installation in the housing. The integral package allows easy packing of the cartridge filter to ensure it stays round and flat. It also makes it easy to remove and install the cover. This axial seal approach is far superior to using a radial seal on the deck / housing interface, in terms of maintaining a low level of torque for the removal and installation of the cover. All these features of the invention make it similar to the screw-in filter in its ease of P1199 / 98MX installation. The features of the invention make it almost impossible to improperly install the cartridge in the housing and this factor is considered to be very advantageous when considering the probability of untrained personnel changing the filters and the high costs associated with the filters they leak in terms of damaging expensive equipment and causing environmental problems. It is also worth noting that the embodiment includes a drain plug 318 on cover 311., The drain plug is important in a filter arrangement as illustrated since the removal or removal of the cover will likely release a large amount of oil that can be carried by the cover. Thus, during normal operation, it may be preferable to first remove the drain valve 318 and allow the oil to drain from the filter cartridge, before removing the lid. The filter cartridge 22 is removed, a new cartridge is placed on the central tube and the lid is replaced, which completes the filter change. To assist in the removal or removal and securing of the cover, the outer periphery is provided with a plurality of finger lugs 23a and a central mamelon 23b with a hexagonal configuration is provided. In this way, the filter cover can be removed using the finger pins 23a or a die P1199 / 98MX of the right size to fit the hexagonal masonry 23b. Of course, if desired, even a standard filter key can be used, although it is thought to be less convenient. However, due to the casting nature of the cover, damage is not likely to result even when a filter wrench is used. Figure 7 is a view similar to Figure 2, illustrating another, currently preferred, mode of the present invention. This mode is the preferred one, because it obtains a greater advantage of the positive attributes of the invention in the first mode. Figure 7 shows a "double-flow" filter as described and claimed in the Patent of the States United of Joint Ownership of Brown et al., No. 5,342,511 and in United States Patent No. 5,078,877, of Cudaback et al. Filter systems of this type are frequently used as a lubrication system for large diesel engines, for example. As such, the same filter elements are often very large, resulting in a can or can that is also quite large. It has been common practice to have relatively large filters of this type in a conventional package or screw unit. The package or bolted unit takes advantage of the metal sheet construction and avoids the need for a large cast metal housing, P1199 / 98MX which would be excessively expensive, difficult to manufacture and heavy. However, the metal sheet housing of the screw cartridge needs to survive only one installation / removal cycle, after which it will be discarded. He was not required, nor was he able, to endure many years of life in a high maintenance written environment such as a diesel power plant for a tractor trailer. In accordance with the present invention, there is provided a filter housing having a large size capable of containing a filter cartridge of the appropriate size to satisfy the lubrication requirements of a large diesel engine, which uses a replaceable filter cartridge and which also uses a shell mainly of stiffened metal sheet and reinforced to function as a permanent filter housing, on the engine. Figure 7 shows a filter housing that includes a metal foil shell 400, a two element base 401 comprising a first base member 401a and a second base member 401b, the base members being secured at an open end at the base of the base member. the shell 400. In the preferred embodiment, the base 401 carries a pair of central tubes 402, 403. The filter unit has in turn two concentric cylindrical filters 405, 406, P1199 / 98MX supported on the respective center tubes 402, 403. A cover 412 has a set of internal threads 413 which engage a thread engaging assembly 414 in a stiffening ring 415. A plug 416 is provided for draining the oil so that it can be removed to drain the oil from the housing before the cover is removed. Referring concurrently to Figures 7 and 8, it will be noted that the base member joins in a manner very similar to the base member of the previous embodiment. A single central screw 420 is provided which fits into a threaded opening 421 in a motor schematically illustrated at 430. The arrangement or arrangement of the motor is best illustrated in Figure 9, which shows the threaded opening 421 having an arrangement of ports. The ports include the central ports 432 which are associated with the threaded opening 421 and provide a path for twice filtering the oil back into the engine crankcase. A hollow arched groove 433 is the inlet for the filtered oil returned to the engine. A similar arched port 434 but, in a different center from that of port 433, is hollowed out in the motor and serves as a supply of unfiltered oil to the filter. A final smooth hole opening 435 is provided to locate a torsion bolt, which prevents rotation of the housing P1199 / 98MX filter in the motor. A view of Figure 9 will demonstrate the relative simplicity of engine manufacture provided by the use of a filter in accordance with the present invention. In contrast to the use of the conventional canister or screw can, the use of the present invention does not require that additional parts be inserted into the engine prior to insertion of the same filter housing. Using bolt-on boats, the engine would require certain openings and ports, certain sealing faces for the packing and a threaded opening in the center to receive a cup. However, in addition to the casting, cleaning and machining operations that would need to be performed on the engine block in order to receive the filter, an additional installation operation would be required to install and secure or secure the cup to the threaded opening of the engine block. motor. That step is avoided in accordance with the present invention. It is simply necessary to hollow the grooves 433, 434 and clean any slag from casting or machining of said grooves. It is necessary to drill the central hole 421 as well as the slots of the associated ports 432 and, tapping or threading the central hole 421. Finally, it is necessary either to cast or machine a hole opening 435 with relatively smooth straight sides for P1199 / 98MX receive the torsion bolt. The elimination of the use of a cup, among other simplifications provided by the present invention, is believed to represent significant cost savings. Figure 8 shows the way in which the engine 430 is coupled with the filter of Figure 7, it will be noted that the inlet body 434 of the engine 430 communicates with a circumferential channel 440 at a particular radius of the center line of the filter. That port 440 is finally communicated with the inlet port 441 of the filter, so that oil flows through port 441 past a flow diverter 442 and into an external chamber 443 (see Figure 7) between the peripheral housing of the shell 400 and the outer periphery of the outer filter cartridge 405. Most of the oil passing through the outer filter cartridge 405 then flows through a port 446 to a circumferential channel 447 (see Figure 8) in the base and, with what enters port 433 to return the engine to lubricate it. A portion of the flux not following this path passes through the inner filter cartridge 406 and the inner central tube 403 to enter an internal chamber 450 defined on the inner side of the inner core tube. The oil that flows to this internal portion thus exits the filter through the small ports 451 drilled around the P1199 / 98MX circumference of the center opening 452 in the base plate 401. So the oil enters a channel 454 in the inner circumference of the filter housing and is passed through the aforementioned ports 432 (Figure 9) towards the engine where it is returned to the crankcase. A multi-segment package 460 placed securely is associated with the base plate 401 to define and separate the channels passing oil between the inlets and outlets of the motor filter. In effect, the filter provides the equivalent of three arosellos, an inner ring 461 that separates channel 454 from channel 446, an intermediate ring 462 that separates channel 446 from flow input channel 440 and an outer ring 463 to contain and define the outer periphery of the outer channel 440, 441. The sections of the o-rings are connected by a plurality of radial ribs spaced around the periphery of the package 460, the ribs connect the rings 461, 462 and are identified in 465 and, an outer set of ribs 466 are interconnected to ring 462 and 463. In a plan view, the ring has the appearance of a spider web, with the concentric rings being joined by ribs, with the entire array being fixed in the slots as illustrated in Figures 7 and 8. The barbed projections 468 fit within the openings in the base plate 401 to further secure P1199 / 98MX to packing 460 instead. In this way, to assemble or assemble the filter in the engine during engine manufacturing, it is simply necessary to take the filter housing and place it on the engine mounting area. It is necessary to rotate the housing so that the anti-rotation pin 469 between the opening 453. After that, the screw 420 is inserted through the opening 452 and, a special long tool is used to couple the head of the screw and turn it towards and the locked or immobilized state in the filter housing. The twisting or turning of the screw 451 serves to firmly insert the base plate 401 into the lower wound side of the can, making the lower connection of said elements even safer. The manner in which the shell 400 is stiffened is very much similar to that illustrated in the previous embodiment. For example, the two-component base plate 400 has a cylindrical flange 470 extending outwardly at the outer periphery of the flange. The flange has an outwardly facing cylindrical channel 471 for receiving a seal ring 472. The shell 400 has a lower portion 474 that is wound around the end of the flange 470 and, which is curved upwardly at 475 to grasp or hold firmly to tab 470 around its entire periphery. The openings are formed in the P1199 / 98MX (for example, by casting) at spaced intervals such as illustrated by the single opening 476 and, the end of the rolled portion 475 of the shell 400 is cold forged in the opening 476 to ensure that the shell does not will rotate on the base. It is recalled that the position will be either additionally secured by looking at the mounting screws 420 which push the package 460 towards a firm contact with the base of the motor but also push the lower portion 470 of the flange towards a coupling with the motor. Referring to the open upper end of shell 400, it will be noted that the upper end is further stiffened by a threaded ring 415 which, like the previous embodiment, has an axially extending flange 480, directed along the axis of the shell 400 in the direction of the open end. The upper portion of the shell 400 is wound on 481 to form a thread that buries the tip or peak of the flange 480. The formation of a continuous cylindrical thread forms a sealing surface 482 which is used to cooperate with a housing packing, as will be described later. In addition, the continuous fillet that securely or firmly holds the tip or spout 482 of the flange 480 tends to secure the ring 415 in position and stiffen the open end of the housing. As P1199 / 98MX that in the previous embodiment, a plurality of indentations arranged peripherally (see Figure 5), are formed in the ring 414 and, in the outer portion of the shell they cold forge these openings to fit tightly according to it is illustrated in Figure 5. The particularity of anti-rotation, which is achieved in this way, has been described above, the rightmost flange 485 shown in Figure 7 illustrates the cold forging to achieve the anti-rotation feature . As in the previous embodiment, the cover 412 is a cast member, in which the thread 413 slips to engage or coincide with the rope 414 of the cast threaded ring. The fingers for the fingers 490 and a hexagonal connection 491 are provided in the cover to help secure and remove the cover. The central tubes 402, 403, like those of the previous embodiment, are fixed securely to the base 401. The filter cartridge itself is more fully disclosed in the aforementioned copending application. However, for the time being, it is sufficient to understand that the filter cartridge includes two 405 concentric filter elements. 406. The filter is configured as a unidirectional device, having a suspended package 500 supported in a first set of end layers P1199 / 98MX 501, which are embedded or encapsulated and secured to the folds of the filter medium 405, 406. As in the above embodiment, the suspended package 500 is connected to the end caps 501 by a continuous resilient flange 502 extending peripherally, which seals at high pressure in chamber 443 of end cap 501. Thus compressive forces are not applied to the filter medium in the lower end cap. The upper end of the filter uses radial seals for the respective filter elements. The external filter element 405 has an end cap 410 that bears an outer radial seal 411 that interconnects with a cylindrical flange 412 to seal at the high pressure of the chamber 443 the lower pressures LP inside the outer central tube 402 Similarly, the cartridge 406 of the internal filter medium has a cylindrical radial seal 414 that engages a flange 416 in the base member to protect an inner end cap 418 from the greater pressure LP seen in the outer peripheral of the filter element 406 and to maintain the end cap 418 at the lower pressure LP seen on the inner side of the central tube 403. The present invention also has certain aspects of methods. Those that involve the formation of a cylindrical housing made of metal embedded in the wall P1199 / 98MX thin for filter but susceptible to a continuous and reliable use as permanent housing. Aspects of the method include the steps of forming a thin-walled metal sheet shell by embedding an initial metal part to form a cylinder of the desired diameter. In the preferred practice of the invention, the end of the induced shell is removed to create an open cylinder at its two ends. The ends of the cylinder are wound, preferably one inwards and the other outwards. A metal bottom member is provided, preferably cast, having a mounting opening for securing the housing to the motor, a complementary port arrangement with a series of ports in the motor to communicate the oil with the motor and a rigidizing tab that it extends down. The flange fits within the wound edge at one end of the cylinder and the end is engargola or cold forged to securely secure the metal member formed with the metal sheet housing, stiffening the housing. An additionally formed metallic element is provided, preferably a casting having threads on the open end of the cylinder. This member also has a tab and, the tab fits within the rolled-out edge of the shell. Preferably, the threaded ring has anti-P1199 / 98MX grooves and, the shell is cold-forged in said anti-rotation grooves, so the threaded ring stiffens to the open end of the housing and also provides a locking thread at the open end which is firmly secured in an anti-rotation manner with the open end. The housing formed in this way can then be secured to the motor, preferably by a single screw and made easy to use. In the most preferred practice of the invention, the housing also includes a central tube arrangement fixed to the base member and, it is used with unsupported and disposable filter cartridges that obtain their radial support during the use of the permanent center tube. Certain advantages of the invention, as will be pointed out below, can be obtained even when using a removable canister that is mounted to an engine in a more conventional base type script. Directly applied aspects of the method of the invention involve the embedding of a thin-walled metal canister in which one end of the canister remains closed. The open end of the can has its rolled edge, preferably outwardly and a flange of the threaded ring, as will be described in more detail below, fits within the wound section to locate a closing thread at the open end of the housing and also to stiffen to the extreme P1199 / 98MX open. The threaded ring is fitted with anti-rotation notches and the rolled edge of the can is stepped into the anti-rotation notches to provide a can that can be removed and reused as a permanent device. The above-mentioned co-pending patent applications have certain embodiments that use a metal canister with a closed end into which a filter cartridge is inserted, before the canister with the inserted filter cartridge is mounted on a mounting base in the container. motor. There is one aspect of the present invention that is applicable to this arrangement. More particularly, advantage is taken of the present invention by securing a cast metal ring having a threaded section and an axially extending flange, like the ring of Figure 5, secured to the open end of the can. The cold forged fittings 383 are also used and the result is that the closed can has an open end configured in accordance with the invention with a stiffening member that carries external threads to allow the canister to be secured to a threaded member mounted on the motor. . It will then be appreciated that an improved filter housing has been provided for automotive lubrication purposes. Accommodation is much lighter (considering its size) and less expensive than P1199 / 98MX conventional side housings. In contrast, the primary structural elements of the housing according to the invention are of thin metal foil induced not unlike the metal foil used in the screw-in boats but, configured in such a way as to make the housing made of metal foil be permanent and intends the continuous reuse during the life of the engine between reconstructions. The thin-walled shell is made rigid by the judicious use of cast members, attached to the thin-walled shell in accordance with the teachings of the present invention, to provide a filter system that is efficient, which is light, comparatively economical to manufacture and, you can use filters that are totally and easily disposable.

P1199 / 98MX

Claims (17)

1. NOVELTY OF THE INVENTION Having described the present invention, it is considered as a novelty and, therefore, the content of the following CLAIMS is claimed as property: 1. An oil filter unit for use in an engine, the filter unit of oil comprises a housing having a removable cover and supporting or supporting a filter cartridge, the housing comprising: a thin-walled, embossed metal sheet shell having both open ends, a base end of the shell being rolled inwardly on a cylindrical rim of a shell of the shell to form a stiffened mounting base by the shell plate of the shell, a closing end of the shell is rolled out on a cylindrical rim of a threaded metal ring to form an end of closing the shell stiffened by the threaded ring, the rolled edge outward forms a flange shell located with respect to the ring thread To interconnect with a package, the cover is dimensioned to close the closing end and has an internally threaded portion P1199 / 98MX adapted to fit the threaded ring, so as to secure the cover to the shell, the filter cartridge is insertable into the shell and carries a suspended package adapted to fit over the flange of the shell and remain in position on the flange of the shell, as the cover is placed on the shell and turns to a secured position. The combination according to claim 1, wherein the flange of the shell of the shell comprises: a cylindrical flange which fits inside the rolled section, inwards at the base end of the shell, anti-rotation indentations on the plate base of the shell in angular positions spaced around the periphery thereof, and the inwardly rolled section of the shell is punched in the indentations to mount the base plate of the shell in the form of locked rotation in the shell. 3. The combination according to claim 1, which includes a mounting surface on the motor, the motor only has a single threaded opening for receiving the base plate of the shell and a threaded fastener projecting through a central opening in the baseplate of the shell and which engages with the threaded opening in the mounting surface to secure the shell to the engine. 4. The combination according to claim 3, in P1199 / 98MX where the motor is provided with an oil inlet port in the form of an arched opening and a return of filtered oil through the threaded opening, the base of the shell carries a retained base plate gasket that seals the opening arched of the adapted return of the oil. The combination according to claim 4, wherein the packing unit of the base plate has associated barbed projections in the openings of the base plate, the barbed projections will be placed to prevent displacement of the base plate packing during assembly of the base plate. filter housing in the engine. The combination according to claim 3, wherein the unique threaded opening for the base plate of the shell is associated with the same oil flow paths for oil flow between the engine and the filter housing. The combination according to claim 3, wherein the base plate of the shell includes an anti-rotation bolt and the engine has an opening for receiving the anti-rotation bolt and preventing rotation of the housing after the fastener immobilizes the housing in the engine. The combination according to claim 7, wherein the end rolled out of the shell in the P1199 / 98MX closing end has portions that interlock a plurality of peripherally spaced indentations in the threaded ring, in order to thereby provide an anti-rotation lock of the threaded ring with the shell. 9. The combination according to claim 1, wherein the base plate of the shell further includes a permanent central tube mounted on the base plate of the shell and having perforations to allow the passage of oil through the central tube, the central tube is sized to accept an internal peripheral of the shell. filter cartridge to support the filter cartridge against radial crushing. The combination according to claim 9, wherein the base plate of the shell has an annular cylindrical flange projecting towards the shell and the filter cartridge has end caps and a radial seal gasket in the form of an elastomeric cylinder Extended, of a size adapted to seal with the annular flange, the radial seal gasket will be placed to prevent leakage from the higher pressure region in the outer peripheral of the filter cartridge. The combination according to claim 10, wherein the plate, base of the shell includes a flow diverter interposed in the oil flow path to avoid directing the flow over an interface in the joint P1199 / 98MX between the radial seal packing and the flange. The combination according to claim 1, wherein the cover further includes a stopper for draining removable oil to drain oils from the housing before removing the cover. The combination according to claim 1, wherein the cover has an internal cylindrical sealing surface, an axial seal resilient packing in the cartridge for coupling with the cylindrical surface, when the cover is secured in position and the cover and the filter provide a path for the communication of a lower pressure in a region within the filter cartridge with the axial seal packing, whereby the higher pressure at the outer periphery of the filter cartridge forces the axial packing towards a sealing relationship, without imposing axial crushing loads on the filter cartridge. The combination according to claim 1, wherein the shell plate of the shell includes two central tubes, the filter cartridge has two concentric and cylindrical filter elements that include an outer element and an inner element, the radial seals in a first end of both filter elements and the axial seals in the second ends of the same and the axial seals will be located near the peripheral ones P1199 / 98MX outside of the respective filter elements to make the pressure in the respective outer peripheries fit with the axial seals and energize the associated filter element. The combination according to claim 14, wherein the filter cartridge carries the package suspended outwardly from the outer element and displaces it in a position to engage the flange of the shell when the filter cartridge is inserted into the shell, which in this way it will be automatically located to seal the housing when the cover is rotated into place. 16. The combination according to claim 1, further including a hoop seal interposed between the base plate of the shell and the shell, the shell has a stepped section on the outer periphery thereof creating a smaller diameter portion in the shell. base of the same, to hold securely to the base of the shell and confer to the arosello packing. 17. A method for forming a permanent housing for a filter, the method comprises the steps of: making a deep embedding of a primary metal part to form a cylindrical shell of predetermined length and diameter, removing the end of the embedded metal shell P1199 / 98MX to form an open cylinder at both ends, wind the open ends of the cylinder to form an inwardly wound section at a base end and a section rolled out at a closing end, provide a formed metal base having an opening to secure the base to an engine, a pattern of ports to cooperate with the oil inlet and outlet ports in the engine and a flange securing the shell, adjust the securing tab of the shell in the rolled and purse or tightening the rolled section of the shell to secure the base thereto, providing a threaded ring formed for the closing end of the shell having a shell mounting flange dimensioned to intertwine with the section rolled outward and which in the it has anti-rotation indentations, adjust the threaded ring to the closing end of the shell with the flange attached inside the section Rolled and cold-rolled the section wound on the end of closure on the flange of the threaded ring to fix the ring on the shell with a connection that is secured both axially and rotationally. P1199 / 98MX