US2018554A - Bibb seating tool - Google Patents

Description

Oct. 22, 1935. R. G. HAWKER 2,018,554

BIBB SEATING TOOL Filed Oct. 7I 1933 Il un IIN Patented Oct. 22, 1935` UNITED STATES PATENT OFFICE BIBB SEATING 'rooL Roland e. Hawker, Troy, N. Y.

Application October 7, 1933, Serial No. 692.662

1Claim. V(Cl. Sii-12.5)

This invention relates to valve seating tools which are particularly adapted for renewing the seating surfaces of globe valves, bibb type faucets and analogous constructions.

The present tool is applicable to a wide range of sizes of valves and faucets, with which it is detachably engageable by means of a universal mounting or an adaptor therefor. Such mounting forms a guide for a revoluble cutter shaft, having a cutter head of improved design, adapted to form a contoured seat of maximum size with minimum waste of material and lost space, which comprises one of the dominant features of the invention, and including manually adjustable means for positively feeding the cutter head and shaft axially independent of their rotation.

The object of the invention is to simplify the structure as well as the means and mode of operation of such devices whereby they will not only be cheap in construction, but will be more eficient and convenient in use, accurate in operation, uniform in action, easily operable and unlikely to get out of repair.

A further object of the invention is to provide an improvedl form of mounting for the tool and to provide positive feeding means for the cutter shaft.

A further object of the invention is to provide adaptors by which the range of adaptation may be greatly extended to include valves of extreme sizes.

A further object of the invention is to provide a cutter shaped to produce a seat having a contact surface which will afford maximum service and will be unlikely to penetrate the washer or valve head under heavy pressure to which such valves are subjected.

A further object of the invention is to utilize the maximum amount of diaphragm area available for seating purposes, limited only by the size of the throat or fixture opening through which the cutter must be introduced.

A further object of the invention is to provide a cutter head having peripheral clearance which will facilitate its operation and to further provide a' tapered centering seat by which the cutter is more accurately located with reference to the valve seat being formed.

A further object of the invention is to minimize waste space and removal of material in the formation of the seat.

With the above primary and other incidental objects in view, as will more fully appear inthe specification, the invention consist: of the features of construction, the parts and combina-- tions thereof, and the mode of operation, or their equivalents, as hereinafter described yand set forthl in the claims.

In the accompanying drawing, wherein is shown the preferred butobviously not necessar- 5 ily the only forms of embodiment of the invention, Fig. 1 is a side elevation, partly in section, of a bibb type faucet and the tool, forming the subject matter hereof, applied thereto. Fig. 2 is a vertical sectional view of the tool assembly. l0 Fig. 3 is a top plan view. Fig. 4 is 'an enlarged side elevation of the cutter head, showing it applied to the diaphragm or partition of a fixture illustrated in section. Fig. 5 is a detail sectional view of the completed valve seat, showing the 15 application of a closure valve thereto. Fig. 6 is a detail view of a modification of the mounting member for the adjusting screw. Fig. 7 is a side elevation of an adaptor, by use of which the toolv may be applied to fixtures of smaller size. 20 Fig. 8 is a sectional View of a further adaptor. Fig. 9 is a side elevation of a modification of the cutter head, wherein cutting vedges are provided on the terminal end of the pilot portion.

Fig. 10 is a view of a universal adaptor with parts ,25,

broken away and shown in section.

Like parts are indicated by similar characters of reference throughout the several views. n In the accompanying drawing, I indicates a typical bibb type faucet embodying'a diaphragm 30 or division wall 2 having therein an opening about which is located a valve seat 3 to be formed or reiinished.

The present valve seating device is detachably engageable with-the screw threaded top 4 of a 55 valve or faucet which ordinarily receives a packing gland for the valve stem. In some fixtures, the top 4 is interiorly screw threaded while in other fixtures such portion is threaded exteriorly. The present tool is universally adaptable to o either exteriorly or interiorly threaded xtures by means of a mounting cone 5 having both interior and exterior conical screw threaded surfaces 6 and 1. By reversing the position of the mounting cone 5, it may be engaged ,either interiorly or exteriorly of the threaded portion 4 of the fixture. The conical form of the mounting member affords a relatively wide range of adaptability, enabling such cone to be engagedV at one point or another throughout its tapered form, either interiorly or exteriorly of flxtures of various sizes. Although the surfaces 6 and 'I will not conform to the threaded surfaces of the fixtures, nevertheless at a point of corresponding diameter there will be ample interengagement of 55 the threads of the mounting cone with those of the valve or faucet to temporarily hold the cone firmly in engagement during the reseating or seat reaming operation.

Beyond the interior conical threaded portion 1 of the mounting cone 5, such member is provided with a straight interiorly threaded bore 8 to receive a bearing and feeding sleeve 9. This bearing member 9 is provided with a straight threaded portion I0 adjustably engageable Within the threaded bore 8 of the mounting cone 5. The adjustable sleeve 8 is provided with a smooth bore which affords an extended guide bearing lfor a bushing sleeve I I engageable in different positions of axial adjustment upon the cutter shaft I2.

The bushing sleeve II is peripherally flanged at the lowerend at I3 to afford an abutment for the end of the screw threaded adjusting sleeve 9.. The upper end of the tubular bushing II is longitudinally slotted at I4 and is engageable within a surrounding clamp collar I5 adapted to be contracted by the screw I6 into clamping engagement with the tubular bushing II and thereby contract the bushing II immovably upon the cutter shaft I2. The feed screw 5 is free for rotation about the tubular bushing II intermediate the terminal head or flange I8 and the clamp collar I5. To facilitate its rotary adjustment, the feed screw 8 is provided with a head I'I which may be peripherally knurled or of polygonal form. By such screw threaded adjustment within the cylindrical bore 8 of the mounting cone, the cutter shaft I2 is adjusted axially relative to the mounting cone and the faucet or valve with which the cone is interengaged independently of the rotation of such shaft.

To adapt the device to fixtures too small to receive the threaded surface 6 of the cone, which it is to be understood may be reversed in its relation to the feeding screw 9, an adaptor cone I8, illustrated in Fig. 7 and which tapers to a smaller diameter suitable to enter the fixture orifice of lesser size isengageable with the mounting cone 5. The adaptor I8 is of double tapered form havinga short screw threaded tapered end I9 of larger diameter engageable in the larger end of the interiorly screw threaded mounting cone 5, while its opposite smaller end is engageable within the fixture. There are sometimes encountered fixtures wherein the top' portion l is exteriorly threaded, but of such short extent that 'the spout or other configuration of the valve or faucet design interferes with the use of the cone 5 by preventing its descent over such top info screw threaded engagement therewith. For such emergency there is preferably employed a short interiorly threaded tapered collar 20 engageable exteriorly over the fixture and within which the smallerv end of either of the tapered threaded cones 5 or i8 may be inserted. For convenience the adaptor collar 20 may be temporarily engaged with the mounting cone 5, as illustrated.

1, when not in use, thus by dotted lines in Fig. avoiding loose parts and keeping the assembly intact for storage and transportation.

In lieu of the split clamp collar I5 for fixedly securing the bearing bushing on the shaft I2, the bushing II may be tapered at its split end and screw threaded to receive a clamp nut 2I, as illustrated in Fig. 6. In such embodiment, the bearing bushing is preferably keyed or otherwise non-rotatively engaged with the shaft I2, but

capable of longitudinal adjustment thereon.

In the formation of valve and faucet seats forming the seat for the valve head, is ordi- 10 narily of such acute form that it quickly becomes embedded in the valve head or closure which is ordinarily of rubber, fiber, or other compressible material. Such valves, having screw stems ordinarily provided with operating levers, 15 are subject to'quite heavy pressure, amounting to some hundreds of pounds when tightly'closed by the ordinary user. This quickly cuts and destroys the washer or valve head and induces undue wear upon the reduced seating surface, 20 causing leaky fixtures and necessitating frequent replacement. One of the dominant features of the present invention is the utilization of as large an area of the diaphragm or partition wall of the fixture for valve seating purposes as will 25 be permitted by the size of the throat or opening of the fixture through which the cutter head must be introduced. To this end, a minimum amount of material is removed from the outer margin of the seating surface, reducing the` sur- 30 rounding recess to a mere kerf, only sufficient to permit the rounding of the seating area.

Upon the lower end of the stem or shaft I2 is detachably mounted a cutter head 28, interchangeable with other like cutter heads of dif- 35 ferent diameters. The cutter head 23 is provided with a terminal pilot portion of reduced dlameter and a larger portion 25, fiuted to form a succession of .radial cutting edges, indented at 26 to agree with the contour on the seating suro face to be produced. The outer periphery of the enlarged body portion 25 is upwardly tapered to provide ample clearance and the dependent outer extremities 21 of the radial indented cutting edges 26 are brought to comparatively nar- 45 row sharp definition. This enables the indentation 26 to be relatively wide to produce an ample wide seating surface and minimizes the removal of material from the surrounding annular recess or groove by which the contoured seat is defined. 50 The cutting edges, within the indentation 26, are rearwardly beveled relative to the direction of rotation at 28 as are also the marginal dependent narrow cutting edges 21. s rearward bevel, indicated at 28 in Fig. 4, a ords the nec- 55 essary clearance to produce a smooth uniform Surface upon the rounded bead or rib 3 formed in the diaphragm or partition wall oi' the fixture.

While the cutter head 25 has been illustrated as being fiuted to form a succession of four rano dial cutters, it is to be understood `that it may be formed with a greater or lesser number. It is to be noted, however, that. these cutting edges. pertaining to lthe formation of the sent 3. are all terminal or axinl relativi` to the ruiter head and that peripheral cutting edges are not formed upon this portion of the cutter.

The terminal or pilot portion 24 of the cutterl head is longitudinally tapered. but in reverse direction to the taper of the body 25. The taper 70 the diaphragm or partition of the xture to be reseated. Consequently the reduced portion 24 of the cutter acts as a reamer to slightly enlarge the opening whereby the pilot portion is made to accurately fit the opening. By thus making the water-way opening exactly correspond to the size of the pilot, the cutter head will automatically center itself relative to the seat to be formed. The tapered form of such reduced pilot portion reams the hole slightly conical so that the cutter has at all times a tight wedging fit in the opening which continues to be slightly enlarged as the seat is formed by the continued rotation of the cutter, thus maintaining such tight centering fit. The engagement of a pilot portion in the valve hole has heretofore been employed for centering seat cutting tools, but the continued rotation of the pilot portion during the formation of the seat tended to enlarge the hole to greater size than the pilot, leaving the tool loosey to wobble therein. The taper upon the present pilot portion 24, by continuing the formation of the tapered opening as the seating operation proceeds, obviates any lost motion. and

insures accurate formation of the seating sur# face.

By the present device, the sea produced is the largest possible within the limit of the throat of the fixture through which the cutter must be introduced, and utilizes the maximum amount of material for contact area. The body of the cutter employed is preferably the largest that will pass through the throat of the xture. The preferred shape of the seat is that of a rounded annulus, the height of the bead vor rib being less than its width, whereby advantage is taken of all the material possible for pressure resistance.

While the preferred form of seat comprises an annular convex seat 29, it is to be understood that by varying the contour of the cutting edge 2G of the cutter, concave, bevel, fiat, or other shapes of seats may be produced.

In Fig. 9 there is shown a modification wherein the terminal of the pilot portion of the cutter is provided with radial cutting edges, thus affording an end mill for surfacing flat areas. While for illustrative purposes the sides of the pilot portion in Fig. 9 are shown straight, these may if desired be tapered'.

In Fig. 10 there is shown a modified form of adapter or mounting 38 of universal character for use in lieu of the mounting members I, 5 and 20. The universal mounting 3l comprises multiple interior and exterior tapered screw threaded surfaces of different diameters for engagement with xtures of different sizes, all combined into a single compact unit. It is to be noted that the unit includes a large exterior threaded conical surface Il and a small like surface 32 and two such external tapered surfaces 33 and Il of intermediate sizes. Likewise it embodies the larger interior conical tapered surface 35 and small interiorly threaded tapered 5 surface 36 and a like surface 31 of intermediate size. There is'thus aiorded a wide range of adaptability. The adapter is further provided with a central threaded bore 8 for reception of the threaded feeding sleeve 9 in the manner shown 10 in Figs. 1 and 2. This universal mounting or adapter device as illustrated in Fig. 10 is the preferable construction for use oi' a service man who encounters xtures of various forms and vmany different sizes. 15

From the above description it will be apparent that there is thus provided a device of the charactor described possessing the particular features of advantage before enumerated as desir able, but which obviously is susceptible of mod g@ ication in its form, proportions, detail construeum tion and arrangement of parts without depart ing from the principle involved or sacrificing any of its advantages.

While in order to comply with the statute, the 25 invention has been described in language more or less specific as to structural features, it is to be understood that the invention is not limited to the specific features shown, but that the means and construction herein disclosed comprise the :c preferred form of several modes of putting the invention into effect, and the invention is theren fore claimed in any of its forms or modifications within the legitimate and valid scope of the apg pended claim.

Having thus described my invention. I claim:

A valve seating tool for contouring the valve seats of plumbing fixtures, a shouldered body having an overhanging portion the maximum di1 ameter of which is substantially equal to the 0 xture opening'through which the body must be introduced and a tapered reamer portion, said body having inverted J-shaped cutting edges the stems of the Js being inclined with respect to the axis of rotation of the cutter and extending 5 along the tapered portion to centralize the cut ting tool and ream the throat of the xture, the loops of the J-shaped cutting edges extending along the terminal face of the overhanging portion for cutting a bead-like cross sectional shape of the valve seat utilizing the maximum amount of available diaphragm therefor, the periphery of the overhanging body portion being reversely tapered with respect to the centralizing tapered reamer portion to provide a clearance between the outer cut wall and the overhanging body portion.

ROLAND G. HAWKER.

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