US1937943A - Filter - Google Patents

Description

J. BROWN FILTER Filed Aug. 15, 1952 Dec. 5, 1933.

Patented Dec. 5, 1933 FILTER Jerome Brown, Milwaukee, Wil., assigner Briggs & Stratton Corporation. Milwaukee,

Wis., a corporation of Delaware Application August is, im. serai No. szassi s claim. (ci. 21o- 1w This invention relates to filters and refers more particularly to oil filters for use with internal combustion'engines and the like.

It is an object of this invention to provide a filtering device of economical but emcient construction.

Another obie'ct of this invention is to provide a filtering device having a filtering medium formed of wool or other suitable fibrous material arranged in layers or sections maintained in different states of compression to have different degrees of porosity.

With the above and other objects in view which will appear as the description proceeds, this invention resides in the novel construction, combination and arrangement of parts substantially as hereinafter described and more particularly defined bythe appended claims, it being understood that such -changes in the precise embodiment of the herein disclosed invention may be made as come within the scope of the claims.

In the accompanying drawing one complete example of the physical embodiment of this invention is illustrated constructed according to the best mode so far devisedfor the practical application'of the principles thereof, and in which:

Figure 1 is a longitudinal sectional view through a filtering device constructed in accordance with this invention; and

Figure 2 is a cross section taken through Figure 1 on the plane of the line 2-2.

Referring now more particularly to the accompanying drawing in which like numerals indicate like parts throughout the several views, the numeral 5 designates a container or receptacle preferably of cylindrical construction and having a cylindrical side wall 6, a top 7 and a bottom 8. The top and bottom are dished outwardly and have radialiA reinforcing ribs 9 to increase their rigidity. The` attachment of the top and bottom to the cylindrical side wall 6 is obtained by spinning the peripheral portions 10 of the top and bottom over the outwardly flared ends of the side wall.

The top 7 has an inlet nipple 11 secured thereto in any suitable manner and an auxiliary outlet nipple 12 similarly attached thereto. The inlet nipple 11V opens directly to the interior of the container, but the auxiliary outlet nipple l2 has a tube 13 attached thereto to extend entirely through the container with its lower open end 14 terminating directly adjacent the bottom 8.

' the outlet 15.

Fluid may thus be conducted into the container through the inlet 11 and withdrawn from the container through ,the tube 13 and the auxiliary outlet 12.

' A main outlet nipple 15 conveniently provided 60 by a hex nut 16 welded or otherwise attached to the 4central portion of the bottom 8 is also provided. Obviously, if the main outlet 15 is to be used, a stop plug (not shown) is inserted .in the auxiliary outlet nipple 12 and if the auxiliary 65 outlet 12 is to be used, which depends upon the connections of the system with which the device is employed, th stop plug is inserted in the nipple 15 as. will be readily apparent. In this l manner, theadaptability of the device is in- 10 creased.

Within the container is a mass of resilient compressible fibrous material indicated generally by the numeral l'l. This mass of fibrous material substantially lls the entire interior of the container and may be ordinary animal wool or any other suitable resilient fibrous material.

It has been found that merely filling the entire container with one mass of wool affords a fairly good filtering medium, but to increase the eiiiciency thereof the fibrous material is arranged in layers or sections maintained separated in different states of compression so that a plurality of filter barriers having successively nner degrees of porosity are provided.` To this end the .fibrous material 17 is divided into three separate sections or bodies 18, 19 and 20 with the section 18 directly engaging the top 7 and the section 20 adjacent the bottom 8.

Perforate separators 21 and 22 serve to space 90 the sections 18 and 19, and 19 and 20 from each other. These separators are conveniently formed of conventional expanded metal lath. A third separator or partition 23 overlies the inner face of the bottom 8 to maintain a space between it and the bottom wall, in which the oil, after having passed through the mass of filtering material, accumulates to flow either out through the main outlet 15 or up through the tube 13 to leave the container at the auxiliary outlet 12. 10

It is to be observed that the main outlet is protected against clogging by a small hood 24 having depending legs resting on the bottom wall with its top spaced above the opening of wr 'I'he quantities of wool or other resilient material comprising the sections 18, 19 and 20 are substantially equal before being packed into the container so that when inserted therein the different siaes of the spaces within which they are 11 maintained, places them, in different states of compression. The size of the spaces is defined by a spacing member 25 which consists merely of a fiat strip of metal having a wide end portion 26 and a narrow end portion 27 with the shoulder 28 formed by the juncture therebetween engaging the upper face of the partition 21 and the extreme end of the narrow portion 27 resting on the partition 22.

In assembling the unit, the cover 9 with the inlet nipple 11 and the auxiliary outlet nipple 12 and its tube 13 attached thereto, is first secured to the cylindrical side wall 6. .The quantity of material to form the section 18 of the filterl medium is then inserted into the container with the spacer 25 therein. Next, the partition 21 is' applied over the small end 27 of the spacer and then the mass of material to form the section 19 of the filter is inserted. Following this, the partition 22 is applied and then the material to form the section 20 and the partition 23. These elements are then compressed until the partition 23 is positioned sufiiciently inward of the open end of the container to permit the bottom 8 to be secured in place. Obviously, after the marginal edges of the bottom 9 are spun over, the entire structure is complete.

From theforegoing description taken in connection with the accompanying drawing, it will be readily apparent to those skilled in the art to which an invention of the character described appertains, that the filter of this invention is exceptionally simple in construction, that the materials entering into its construction are all of low cost and that the method of manufacture may be conducted economically.

" What I claim as my invention is:

1. A device to clean lubricating oil and similar liquids comprising, a receptacle having end walls and through which the liquid to be cleaned is caused to flow under pressure, and a plurality of barriers which together completely fill the receptacle, said barriers being composed of compressible resilient fibrous material and being held in different states of compression between said end walls so as to have different, degrees of porosity 2. In a filter device of the character described, a container, and a filter medium in the container and comprising separated quantities of compressible, resilient, fibrous material, said quantities of resilient fibrous material being under differnt degrees of compression to form barriers of different degrees of porosity and completely filling the container.

3. In a filter device of the character described, a container, separate quantities of compressible fibrous material jointly substantially filling the container, and means to maintain said quantities of compressible fibrous material separated and in different degrees of. compression so that the said separated quantities of fibrous material provide filtering barriers of different degrees of porosity.

4. In a filtering device of the character described, a container, a filtering medium substantially entirely filling the container and comprising, quantities of compressible fibrous mamaterial, perforate partitions dividing said quantities of compressible fibrous material, and means bearing against one wall of the container and engaging the partitions to maintain said partitions spaced from said wall of the container and at predetermined distances apart so that said quantities of fibrous material separated by the partitions are maintained in different degrees of compression to afford filtering barriers of different degrees of porosity.

5. A filtering device of the character described, comprising, a container, a plurality of perforate vl l partitions Within the container, a spacing member extending longitudinally within the container and engaging one end wall thereof and said plurality of perforate partitions to maintain said partitions at predetermined distances apart and at a predetermined distance from said end wall of the container, and quantities of a compressible fibrous material substantially filling the4 entire container and maintained in different degrees of compression by said partitions to afford filtering barriers of different degrees of porosity. 6. A filtering medium for oil filters and the like comprising a plurality of equal masses of compressible fibrous material, and means to maintain said masses of compressible fibrous material in spaces of different sizes so that the masses of material are compressed to different degrees and afford filtering barriers of different degrees of porosity.

7. A filtering medium for filters of the character described comprising separate quantities of compressible fibrous material in stacked relation, and means toconfine said stacked quantities of material in different states of compression.

8. A filtering device of the character described comprising, a container open at one end, a plurality of substantially equal quantities of compressible fibrous material in said container, perforate partitions between said quantities of compressible fibrous material, a cover closing the open end of the container and confining the quantities of fibrous material in the container under compression so that said quantities of material completely fill the container, and means engaging the cover and the partitions to hold the partitions at predetermined distances from each other and from said cover so that the partitions in conjunction with the Walls of the container define spaces of unequal size in which the equal quantities of fibrous material are confined in different states of compression.

JEROME BROWN.

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