Abstract: The specification discloses an improved high strength spin-on fluid filter (10) including a housing (12), cover (28) and filter element assembly (18). The cover (28) includes a hub (30), rim (34), and radial ribs (32) and is preferably formed as an integral unit. The open end of the housing (12) is folded inwardly and back on itself over the rim (34) to form a folded connection (47) between the cover (28) and housing. Spacers (52) are preferably utilized around the lower end of the filter element assembly (18) to assure pressure equalization thereacross.

Abstract: An oil filter suitably formed to provide integrally therewith a turning attachment to facilitate the interchanging of oil filters on engines and the like which include an oil filter canister. In the preferred form the filter body has substantially cylindrical configuration, upon which an interlocking instrument is disposed on an outer surface thereof. Various forms of the invention provide an interengaging implement to coact with the interlocking instrument selectively so that the oil filter canister can be rotated in either direction along its longitudinal axis by means of lever bars which in one form are affixed to the interengaging implement and pivoted thereto so that when not in use, the lever bars can be folded to reside substantially parallel to the outer annular walls of the canister.

Abstract: A fluid filter (10) of the spin-on automotive type has a housing with a unitary closure member (18). The unitary, or one-piece, closure member (18) includes provision for mounting of the filter and for fluid flow therethrough. Two opposed annular flanges (78, 80) of the closure member receive between them the marginal edge (72) of the filter shell in a fluid-tight crimped engagement. This arrangement facilitates manufacture of the filter by providing support to the shell wall (68) during the crimping operation and also provides an exceptionally strong joint between the shell (12) and closure member (18). Another embodiment of the filter has a closure member (18) with a marginal edge (76) having a portion of reduced thickness which facilitates its crimped engagement with the filter shell (12). Methods of making such closure members attain a unitary closure member without welding operations.

Abstract: A fluid filter of the disposable automotive spin-on type has a cup-shaped member and a closure member which together form a chamber for receiving a filtering media. The cup-shaped member has a relatively thin side wall and an open end defined by a marginal edge including a bead. The closure member is a one-piece stamping of uniform thickness and substantially thicker than the cup-shaped member. The closure member closes the open end of the cup-shaped member and includes an annular rim which extends perpendicularly to the plane of the closure member and generally parallel to the side wall of the cup-shaped member. A channel defined by the rim receives the bead of the cup-shaped member and the rim is crimped to form a fluid-tight connection between the members.

Abstract: A spin-on filter coalescer unit having a flow reversing assembly. The filter-coalescer unit includes a cylindrical body which contains an annular filter element surrounded by a coalescing element, and a final separation stage is spaced radially outward of the coalescing element. A cover encloses the open end of the body and is provided with a central outlet port and a plurality of circumferentially spaced inlet ports. The flow reversing assembly comprises a pair of baffle members, one of which can be the cover, which are spaced apart to define a chamber that communicates with the outlet. A plurality of tubular connecting members form sealed conduits extending through the baffle member and establish communication between the inlet ports and the central axial passage within the filter element.

Abstract: A disposable, centrifugal separator of the kind shown, for example, in U.S. Pat. No. 4,106,689 is modified and simplified in that the rotor is made of sheet metal from which bearings are pressed out. These bearings are journaled on fixed stub axles at respective ends of the outer casing, the stub axles also preferably being of pressed out sheet metal.

Abstract: A head assembly for a spin-off filter is provided and comprises a stamped housing having a closed top wall and an open bottom with a flange adapted to sealingly engage the spin-off filter. A tube extends through the housing and is secured to the housing by appropriate means, such as welding. A member is thereafter secured to the tube for detachable connection with the spin-off filter. The tube also includes fluid passage means formed therein so that one end of the tube forms a fluid outlet while the other end of the tube forms a fluid inlet for connection with a fluid system. Fluid flow into the fluid inlet is diverted by the fluid passage means through the spin-off filter and to the fluid outlet.

Abstract: This invention relates to fluid filter units comprising a canister having a filter element permanently retained in the canister by an end plate. The end plate is attached to the canister by a closing ring which is joined to the end plate and which forms a seam joint with the mouth of the canister. An annular seal is provided at the junction of fluid leakage paths past the end plate to the inner and outer peripheries of the closing ring so that the seal closes both leakage paths.Such filter units are particularly suitable for the lubrication systems of internal combustion engines.

Abstract: A filter end cap interference fit structure between the internal wall of a closed end pressure vessel and the outer circumference of an end cap for centering and maintaining a filter element in position internally of the pressure vessel. The structure is arranged so as to take up and account for any differences in manufacturing tolerances of the internal parts which could destroy the proper working relationship thereof. The internal parts are solidly secured between the closed dome end of the pressure vessel and the support mounting plate of the vessel to securely hold a filter element therebetween while assuring take-up of manufacturing tolerances.

Abstract: A filter of the throw away spin-on type having a housing body with a closed end and an open end, a filter element mounted within said body, a cover plate secured to and closing said open end, a gasket retainer secured to the end closure cover plate, fluid input and output apertures provided in both the cover plate and the gasket retainer, the gasket retainer having a recessed pocket extending circumferentially around the fluid flow openings, inwardly of the outer circumference of the gasket retainer, said gasket pocket having a base at a specified angle relative to the surface plane of the cover plate, and a resilient flexible gasket member of special shape retained by the gasket retainer pocket. The specially configured sealing gasket member is preferably of rhomboid shape and thus a cross section thereof forms a parallelogram with oblique angles and opposite sides equal. The top and bottom surfaces of the sealing gasket form an angle of approximately 10.degree.

Abstract: An electric oil refining apparatus for motor vehicle internal combustion engines designed to remove liquid and solid contaminants from oil which is then recycled. The oil exits from a single small orifice into a vaporization chamber where, due to sudden change of temperature and pressure, the liquid contaminants separate from the oil. The stream of oil is then deflected against a heated concave cup which vaporizes liquid contaminants, and allows oil to flow over the floor of the vaporization chamber and back to the internal combustion engine of the motor vehicle for reuse. A filter is provided at the input to the orifice, thereby avoiding clogging of the orifice.

Abstract: A universal filter mounting attachment for engine oil filters comprises a base having valved apertures therethrough and a threaded member selected for connection to a cooperating threaded member on a particular engine. The base carries a latch which cooperates with corresponding structure on the filter to latch the filter to the base and thus to the engine for circulation through the filter of oil from the engine. The base is normally left attached to the engine and the filter is unlatched therefrom for replacement or the like. The latch and the cooperating structure on the filter are designed such that filters may be manufactured in a single configuration and attached to all engines.

Abstract: A filter for liquids with a filter head provided with inlet and outlet channels and with a filter body arranged therebelow which is retained at the filter head by a central threaded connection, and in which the discharge of the liquid takes place centrally; a bolt engaging by means of a thread in the filter body is thereby provided to establish the threaded connection which is in communication by way of a coaxial dead-end bore and a cross bore, on the one hand, with the interior of the filter body and, on the other hand, with the outlet channel in the filter head; a sealing ring is provided between the thread of the bolt and the cross bore which provides a radial seal in the filter head with respect to the bolt bore.

Abstract: A filter for use with different size attaching structures includes multiple attachment members individually and independently cooperable with different ones of the different size attaching structures, whereby a single filter configuration may be manufactured and stocked for desired use with any one of the different size attaching structures.

Abstract: A filter comprising a casing having a hollow body and a closed end and an open end, a cartridge including a filter element, said cartridge being generally toroidal and having an end member with circumferentially spaced integral spring members extending generally axially thereof into engagement with the inner surface of the closed end of the casing, and a closure member closing the open end of the casing and yieldingly urging said filter element toward said closed end against the action of said integral spring members.

Abstract: Flexible assembly facilitating members attached to the valve body of a relief valve for a fluid treatment assembly, such as a fluid filter assembly, serve to maintain the valve components as a unit prior to assembly of the valve into the fluid filter assembly. During final assembly of the filter assembly the assembly facilitating members are biased into an inoperative position whereby operation of the valve is not dependent upon the assembly facilitating members.

Abstract: A fluid filter cartridge having spaced inner and outer perforated walls forming concentric chambers. End plates cap the ends of the walls with one of the end plates being centrally apertured to provide a passageway in communication with the inner wall chamber. A filtering media, preferably of cotton and wood fibers, is packed in the chamber between the inner and outer walls.The improvement comprises a plurality of surface deformations in one of the walls, preferably the outer wall, extending into the filtering media toward the other wall. The surface deformations engage and compress the filtering media contiguous thereto to provide filter flow paths from the one wall to the other of a higher density than that of the uncompressed filtering media.

Abstract: A two-stage fluid filter such as an automotive oil filter. The two-stages of filtering media are mounted inside a conventional cylindrical housing forming fluid inlet and outlet ports in one end thereof. One stage of the filtering media comprises an annular depth type filtering medium having a radially outer surface in fluid communication with the inlet port, and a radially inner surface in fluid communication with the outlet port so that fluid can flow from the inlet port to the outlet port by flowing radially through the depth type medium. The second stage of the filtering media comprises a spirally wound surface type filtering medium, such as filter paper, with alternate pairs of opposed surfaces of the spiral winding bonded to each other along the circumferential edges at one longitudinal end of the spiral winding.