Abstract: A high pressure spin-on filter cartridge utilizes an end plate which is strengthened by four substantially triangular shaped gussets which project from an annular U-shaped bridge that supports an internally threaded hub member. The internally threaded hub member provides an outlet for the filter cartridge while a plurality of radially positioned inlet openings are positioned between the gussets. The gussets extend radially past a sealing gasket that seals the spin-on filter canister with a machine on which it is mounted.

Abstract: A filter assembly is provided having a housing defining a housing edge. A tapping plate is also provided and is generally circular in shape. The tapping plate defines a tapping plate edge and includes a fluid inlet port and a fluid outlet port. Preferably, the at least one fluid outlet port is a central threaded aperture to enable the filter assembly to be secured to a filter mount of an engine. An interconnecting device is included for interconnecting the housing and the tapping plate. The interconnecting device further retains an external seal generally about the tapping plate edge. The external seal is an economically formed lathe-cut gasket and the interconnecting device includes a first and second extension member. The first extension member is formed integrally with the tapping plate at the tapping plate edge. The second extension member is formed integrally with the housing at the housing edge.

Abstract: A filter cartridge includes a filter housing having a main housing portion and a removable end closure defining a filter element cavity. The main housing portion includes an open annular end having an in-turned annular lip with a series of receiving slots formed in the inner surface of the lip. A filter element is disposed within the housing cavity and includes an end cap with a series of axially-extending drive pins, and an axially-extending stand-off device, where the drive pins are axially longer than the stand-off device. A mounting hub having a central threaded collar for attachment to a base is disposed between the outer surface of the end cap and the lip of the main housing portion. The mounting hub includes a series of orientation through-holes which correspond to the location of the drive pins on the end cap.

Abstract: A filter includes a casing enclosing a filter cartridge and a removable collection bowl. The filter cartridge includes a filter media ring with upper and lower end caps. The lower end cap of the filter cartridge has a ring-shaped member projecting axially downward. The ring-shaped member has an annular portion with radially inward-directed threads, whereby the collection bowl, with radially outward-directed threads, can be removably attached to the cartridge. The ring-shaped member further includes radial flow passages between the threads and the end cap, whereby contaminants may pass from a peripheral region of the filter element interiorly of the ring-shaped member and downwardly into the attached collection bowl. The filter includes an anti-rotation feature, comprising radially outward-directed keys, disposed circumferentially around the annular portion of the ring-shaped member and projecting radially-outward therefrom, and slots formed on the inside surface of the casing.

Abstract: A liquid filter apparatus includes a housing cup, end plate enclosing an end of the housing cup, a filter cartridge positioned within housing cup, and a gasket positioned between the filter cartridge and the end plate. The end plate has a gasket centering projection thereon. The gasket includes a centering depression positioned in engagement with the gasket centering projection of the end plate. The gasket may include a gasket for a lube filter, a gasket for a fuel filter, or a gasket for a coolant filter. A method for assembling a filter assembly includes steps of selecting a gasket from amongst a plurality of different shaped gaskets, and selecting a filter element from amongst a plurality of different filter elements. The gasket selected and the filter elements selected will depend upon the final intended application.

Abstract: A water filtering system for a refrigerator includes a mounting head preferably arranged under a temperature control housing in a fresh food compartment. A replaceable filter cartridge is adapted to be selectively attached to the mounting head in order to complete a fluid circuit from a water supply source to at least one of a water dispenser and an ice maker. The filter cartridge and the mounting head have cooperating camming structure which axially draws a stem portion of the cartridge into a port of the mounting head upon rotation of the cartridge relative to the mounting head during installation of the cartridge. Furthermore, camming structure is also provided to at least partially, axially withdraw the stem portion from the port upon rotation of the cartridge a predetermined amount in an opposing direction. Also provided as part of the water filtering system is a plug which can be used to complete the fluid circuit in the absence of a filter cartridge.

Abstract: A filter, in particular, a fluid filter of the "spin-on" type, comprising a head with an inlet space and an outlet space and with a coaxially extending connecting spigot, a housing with one open end, said housing containing an annular-cylindrical filter element and having a terminal edge that confines said open end and sealingly engages a groove provided in the body of said head and positioned coaxially around said connecting spigot, as well as an annular disc-shaped intermediate piece screwed onto said connecting spigot and supporting said filter element. An edge portion of said intermediate piece extending beyond said filter element is screwed into said housing and is provided with passage openings. Head, intermediate piece and filter housing are sealingly assembled with one single ring.

Abstract: A method of applying a curable powder coating, to a selected portion of a spin-on filter housing, uses a fluidized bed coating apparatus to provide a slip-resistant enhanced gripping surface when cured. This slip-resistant coating is applied to a selected portion of the exterior surface of the filter housing, in order to provide an easily grippable slip-resistant textured surface, once the powder has been cured. The textured coating according to the invention may be applied to a bare untreated plastic or metal surface, or alternatively, may be applied overlapping a cured layer of a conventional coating. A preferred coating is a thermosetting paint powder. In a first embodiment of the invention, a slip-resistant textured surface coating may be applied to the entire exterior surface of a spin-on filter housing, except the base plate thereof.

Abstract: A composite top plate and methods for manufacturing same are described. The top plate includes a metal insert and a non-metallic member. The metal includes a central portion and a flange portion having cut outs to provide an intermittent surface. The non-metallic member is formed on the metal insert and a portion of the non-metallic material is received in the cutouts to thereafter hold the metal fixed relative to the non-metallic member.

Abstract: A filter assembly includes a housing having a cylindrical side wall and a first and second end walls at either end of the cylindrical side wall. The first end wall has a fluid inlet port for receiving fluid to be filtered and at least one fluid outlet port for discharging the filtered fluid. The second end wall is easily removable from the housing, and includes a pressure-activated sensing device preferably extending centrally within filter media to an outlet. The filter media can comprise either a single filter element or a pair of nested filter elements, and is supported between the upper and lower end walls. The pressure-activated sensing device includes a piston assembly which is responsive to a pressure drop across the filter media. A first flow path is provided to the upstream side of the piston assembly from the inlet to the filter assembly, while a second flow path is provided to the downstream side of the piston assembly from the downstream side of the filter media.

Abstract: An improved, reduced waste oil filter has a concave housing having a first end, a fluid inlet port and a fluid outlet port. A concave cover is removably and sealably attached to a second end of the housing providing a closed area with which the inlet and outlet ports communicate. An elongated cylindrical disposable oil filter element is supported within the closed area. The filter element has a perforated center tube, a first end of which detachably communicates with the fluid outlet port, the other end of the center tube being closed. The center tube has a filter media there around so that fluid flow into the closed area through the inlet port flows through the filter media and into the center tube to pass out through the outlet port. The filter element has a length greater than the internal depth of the cover so that when the cover is removed from the housing a portion of the length of the filter element extends exteriorly of the cover to facilitate easy removal and replacement.

Abstract: An oil filter (10) includes a colloidal suspension (12) of PTFE particles less than 2 microns in size retained by capillary forces within the intricacies of the filter media (26) until the filter (10) is installed and engine oil flows at first engine start up following installation. The PTFE colloidal suspension (12) is completely and immediately released into the engine lubricating system when oil flow is initiated. The PTFE colloidal suspension (12) is introduced into the oil filter (10) as one of the last manufacturing steps. Oil filter (10) is disposed vertically with its outlet port (14) at the top. A quantity of the PTFE colloidal suspension is introduced into the outlet port (14) to initially fill a portion of the volume defined by a centertube (18) and a retainer (16). The PTFE colloidal suspension passes through openings (20,24) into contact with filter media (26).

Abstract: A fluid filter for assembly onto a filter head includes a combination of features such that the assembly of the fluid filter onto the filter head establishes radial flow paths within the fluid filter. The filter head includes an externally threaded outer wall and includes an annular inner wall which defines a flow opening. The inner wall is shaped with a protruding portion and a substantially horizontal bearing surface. The fluid filter includes an enclosing outer shell and a filtering element positioned within the outer shell. A support spring is positioned in the base of the outer shell so that it is axially positioned between the outer shell and the filtering element. An internally threaded nutplate is assembled to the outer shell and threadedly engages the externally-threaded outer wall of the filter head. An inner seal is positioned between the nutplate and the primary filtering element and is designed so as to define a hollow interior.

Abstract: Method for removing an oil filter from an engine when the filter is to be replaced or removed and apparatus for assisting such oil filter removal. An air valve is positioned on the casing of the oil filter and air is injected into the volume of the oil filter surrounding the internal filter. The air displaces oil in the oil filter. This reduces the quantity of oil in the oil filter and, after the air chuck and compressed air line are removed from the air valve, allows the oil filter to be removed without dripping oil on the floor of the garage or on the operator performing the servicing of the oil filter.

Abstract: A filter head for use in cooperative engagement with an associated liquid filter comprises a block member having a bypass valve assembly, and a back pressure flow valve assembly. The block member defines an inlet port; an inlet channel positioned for fluid communication between the inlet port and the associated liquid filter; a first outlet port; a second outlet port; and an outlet channel positioned for fluid communication between the associated liquid filter and the first and second outlet ports. When in an open orientation, the bypass valve provides fluid communication between the inlet channel and the outlet channel. When in a closed orientation, the bypass valve blocks fluid communication between the inlet channel and the outlet channel. The back pressure flow valve assembly, when in an open orientation, provides fluid communication between the outlet channel and the second outlet port.

Abstract: A filter assembly particularly suited for a gasoline fuel pump includes a reusable filter element. The filter assembly has a surrounding housing and a base portion. The base portion including a surface for supporting the filter element and a central stand pipe having a thread formation for engaging an outlet tube of an adapter mounted to the top of the housing. Engagement of the stand pipe to the outlet tube pressing a sealing surface of the housing to a sealing surface of the adapter. The filter element can be retained by a retaining ring threaded onto the stand pipe or by a retaining ring assembly which functions to retain the filter element and also to provide sealing surfaces between the housing, the retaining ring assembly and the adapter. The base can also be made unitary with the housing.

Abstract: A fluid filter for filtering a circulating fluid includes an outer shell having a closed first end and opposite thereto an open second end which is defined by a peripheral edge. The outer shell further includes a surrounding sidewall which defines a hollow interior and a filter cartridge is positioned within the hollow interior. A nutplate is positioned in the open second end and is assembled to the outer shell with the peripheral edge of the outer shell being formed over a portion of the nutplate. A floating annular retainer is positioned adjacent the nutplate and in cooperation with the formed peripheral edge creates an annular receiving channel. An annular gasket is placed in the receiving channel and is sized such that there is a side-to-side compressive fit established between the annular gasket and the retainer and a similar compressive fit is established between the annular gasket and formed peripheral edge.

Abstract: A spin-on filter unit for filtering liquids which may be readily disassembled and which utilizes a perforated center tube support disposed within a housing canister having both an open end and a closed end, a mounting head assembly which includes a bayonet connector mechanism adapted for releasable engagement with the open end of the housing canister, and a spring mechanism mechanism which acts upon the center support tube to urge the mounting head assembly bayonet connection mechanism into releasable engagement with the open end of the housing canister after rotation of the mounting head assembly about its center axis relative to the housing canister.

Abstract: A fluid filter assembly which is constructed and arranged to threadedly mount onto an engine block mounting base includes an enclosing outer shell, a filtering element positioned within the outer shell so as to define an annular clearance space between the outer shell and the filtering element. A nutplate is assembled to the outer shell so as to close the outer shell and provide an internally-threaded mounting portion for attachment to the engine block mounting base. The sidewall which defines the threaded mounting portion is free of any flow openings therethrough. A seal arrangement including an inner seal positioned between the nutplate and the filter element and an outer seal positioned between the engine block mounting base and the nutplate is provided as part of the fluid filter assembly.

Abstract: A spin-on filter including an improved baseplate preferably die cast from aluminum and an improved seaming lid preferably stamped from sheet steel. The baseplate includes a hub joined to a rim by ribs. The rim includes slots that receive tabs from the stamped seaming lid to provide for torque transfer between the canister and baseplate. The baseplate provides a seat for the seaming lid interfit with the baseplate to form a outer gasket groove. The baseplate provides the groove inner wall, while the seaming lid provides the groove outer wall and base. The inventive design in the baseplate and seaming lid provide for a groove for receiving an outer gasket and for torque transfer without complex or costly manufacture.

Abstract: A filter for fuel and the like comprising an inner filter element and an outer metal filter can which allows the element and can to work together so that when the filter can is removed from the dispensing apparatus, the filter element springs closed and locks against the filter can so that no fuel is spilled. Additionally, the filter can grasps the filter element and pulls it from the dispensing apparatus.

Abstract: A filter comprises a housing, a support member located within the housing and an adapter member securing the support member to the housing. The support member is provided with a coupling component in the form of a screw-threaded opening for cooperation with a screw-threaded projection of a filter head to secure the filter housing to the filter head.

Abstract: A spin-on filter including an improved baseplate preferably die cast from aluminum provides an inventive outer gasket retaining groove. The baseplate comprises a hub joined to a rim by ribs. The rim provides a generally cylindrical wall and a seating surface extending radially outward therefrom. The cylindrical wall defines an inner vertical wall for the outer gasket retaining groove. Horizontal ribs extending from the top of the wall provides an inventive retaining device for securing and aligning an outer gasket in the retaining groove. The inventive baseplate can be used in filters with or without a seaming lid. The present invention improves the fastening technique for both types of aluminum in the baseplate filters.

Abstract: A unitary nutplate for a fluid filter assembly provides a threaded mounting interface between an engine block mounting base and the remainder of the fluid filter assembly. The unitary nutplate is designed with an enlarged inside diameter in order to reduce the moment arm between the outer shell of the fluid filter assembly and the filtering element. With the enlarged inside diameter, the annular sidewall of the unitary nutplate does not include any flow passageways for the entering fluid and accordingly other flow passageways are created. In one arrangement, the nutplate has a generally cylindrical lower wall which cooperates with an inner seal which is designed with fluid flow passageways. In an alternate nutplate design, depending projections from the lower edge of the nutplate provide a series of flow passageways therebetween and the cooperating inner seal does not include flow passageways.

Abstract: This invention relates to an improved reservoir for power steering fluid which is particularly suitable for use on large vehicles, such as trucks. The improved reservoir of this invention comprises a well to contain a surplus of power steering fluid. The well has an inlet to permit the introduction of fluid from a power steering mechanism into the well, and an outlet to permit the fluid to flow out of the well to the power steering mechanism. The well also has a filter attached over the inlet. The filter comprises a container having a lower chamber, a side chamber, a filter medium and a relief valve. Fluid received in the lower chamber from the inlet pipe flows to the side chamber and through the filter medium from the outside surface to the inside surface, and then out through a center orifice to the well. Fluid at or above a predetermined pressure flows through the pressure relief valve and out through the center orifice to the well.

Abstract: An oil filter includes a housing having a case and a cap detachably engaged with each other and a filter element detachably contained in the housing. An oil-draining hole is provided at a bottom portion of the case. The oil filter further includes a plug member for opening and closing the draining oil hole and a spring member for operating the plug member according to an engagement state of the case and the cap. At an intermediate condition of the engagement state of the case and the cap, the plug member moves to the cap side to open the oil-draining hole. Therefore, before changing the filter element, oil staying in the oil filter can be readily securely discharged to the outside.

Abstract: An aviation filter including an injection molded plastic ring that is formed with only a slight clearance relative to the outer diameter of the cylindrical metal filter. The ring includes an inner circumferential lip that snaps into a recess formed in a rolled seam on an end of the filter, and secured via an adhesive. The ring includes holes that receive a wire connected to corresponding tie downs formed on the mount. A method of manufacturing an aviation filter includes the steps of snapping the plastic lock ring into place on the filter, and using an adhesive to hold the ring in place against rotation.

Abstract: An engine oil filter has an upper cap and a lower case or plate, which are engageable with each other through a projecting portion and a groove portion. In one mode, the projecting portion is inserted into a first longitudinal groove wall and moved along a contact surface of a first skewed groove wall, whereby the cap and the case are moved and fitted together in an axial direction. As axial movement caused by relative rotation between the cap and the case takes place, an O-ring is tightly fitted therebetween at a fixed seal position. This engagement process applies no excessive force to the O-ring so that a sealed state of high reliability is provided.

Abstract: A filter canister assembly for receiving waste from a dental cuspidor includes a canister of generally conventional configuration, with an open upper end fitted with a canister closure, the canister containing a closed disposable filter basket. A hand grip on the closed filter allows a dental technician to hold and dispose of the filter basket without contacting waste material contained within the filter.

Abstract: A reusable fluid filter assembly comprises a cylindrical housing, a top plate assembly, a top plate attachment member, and a replaceable coreless filter element. The housing has means for removably connecting the housing to the top plate, and a hollow central core having an open first end and being connected to the closed end of the housing at the second end. The central core has a plurality of fluid outlet perforations. The top plate has a rim, fluid inlet means and fluid outlet means extending through the top plate. The top plate attachment member has a tubular shape, and a fluid outlet port extending through it. The coreless filter element having annular end caps on first and second open ends is disposed in the housing. The fluid inlet means of the top plate are in fluid communication with a fluid inlet chamber defined by the filter element and housing. The central core extends into the first open end of the filter and the hollow cylindrical chamber of the filter element.

Abstract: A flow inverter element is configured as a molded component having both axial passages and radial passages, which passages are physically isolated from one another. The axial passages communicate with an annular chamber which opens to a series of inlet ports in the end plate of the housing while the radially extending passages communicate with a cylindrical chamber aligned with a central output port in the end of the housing.

Abstract: A device for filtering fluids which is cleanable and re-usable is described. The device includes a cylindrical canister, a cylindrical lid and a filter cartridge. The device is adapted to be disposed in a fluid flow circuit, filtering particulate from the fluid circulating therein. The filter cartridge is quickly removed, cleaned and reused. The fluid enters and exits the device from the top end through fluid inlets and an outlet extending through the lid perpendicular to the lids upper planar surface, thereby reducing the amount of space required to mount the device. The fluid inlets include sloping fins that direct fluids in the filtering chamber in a spiraling action, thereby increasing the effectiveness of the filter.

Abstract: A plastic oil filter comprises a cup-shaped shell with an open end. The shell contains an annular filter media with an elongated opening therethrough. A backplate is positioned in the open end of the shell. An elongated core is positioned in the opening in the filter media. The core is hollow and has a plurality of openings in the walls thereof. A plurality of longitudinally spaced annular rings are formed on the outer surface of the core. Fluid to be filtered can pass through openings in the backplate into the space between the shell and the filter media, through the filter media to be filtered, through the openings in the walls of the core, into the flow passage in the core, and exit from the filter through the flow passage in the core. Sealing washers are provided at each end of the filter media for preventing undesired flow between the core and the ID of the respective sealing washers. Spring structure is formed on the core.

Abstract: An anti reversionary valve assembly with a replaceable anti reversionary valve element for prevention of back flow of lubricant in a machine using fluid pumped through passages for lubrication. The anti reversionary sealing action prevents the drainage of lubricant from passages supplying bearings and high friction areas with lubricant avoiding damages to machinery from dry starts.

Abstract: An adapter which enables a person to use different, selected, sizes of inexpensive, readily available, oil or air filters to act as air filters to provide greater air filtration for hydraulic systems. The adapter includes a body having an axial central opening therethrough; an enlarged, cylindrical, central section having first and second opposed surfaces; a first end section extending from the first surface of the central section and having an enlarged, externally, threaded portion; a smaller, externally, threaded portion extending from the enlarged externally threaded portion; a reduced cylindrical section attached to the second surface of the enlarged, cylindrical, section of the body; and a male bayonet locking member fixed to the free end of the reduced cylindrical section of the body for engagement with a female receptacle member attached to a fluid reservoir.

Abstract: The addition of a bracket type fin attachment to the current design of internal combustion engine oil filters to enhance removal of the oil filter, at replacement time, is the advantage of my new design. This attachment can be molded into the external wall of the oil filter, in addition to many other manufacturing methods, in order to achieve this basic idea. The molded attachment can be sold as a separate unit, similar to the oil filter wrench, although much different in design, and can be reused. The Easily Removable Oil Filter Attachment is for use with all sizes and types of engine oil filters, including: automobiles, boats, trucks, motorcycles and airplanes.

Abstract: An oil filter (10) includes a colloidal suspension (12) of PTFE particles less than 2 microns in size retained by capillary forces within the intricacies of the filter media (26) until the filter (10) is installed and engine oil flows at first engine start up following installation. The PTFE colloidal suspension (12) is completely and immediately released into the engine lubricating system when oil flow is initiated. The PTFE colloidal suspension (12) is introduced into the oil filter (10) as one of the last manufacturing steps. Oil filter (10) is disposed vertically with its outlet port (14) at the top. A quantity of the PTFE colloidal suspension is introduced into the outlet port (14) to initially fill a portion of the volume defined by a centertube (18) and a retainer (16). The PTFE colloidal suspension passes through openings (20,24) into contact with filter media (26).

Abstract: A filter cartridge has an annular filter dement retained within a housing by an end plate. The end plate has a central outlet and a plurality of inlet holes mounted or the end plate is an annular valve support which supports an annular valve member disposed between the valve support and the filter cartridge. A coil spring urges the annular filter member against the valve member which, in turn, engages the valve support and urges the valve support against the end plate. The valve support has an inner sleeve portion which seats against the end plate and an outer sleeve portion with holes therethrough. The valve member has an expandable collar portion which normally seals the bypass holes and a skirt portion which normally seals the inlet holes. When the filter is filtering lubricating oil for an internal combustion engine, the skirt is deflected by pressurized lubricating oil and flows around and through the filter element before passing out of the central outlet in the end plate.

Abstract: A spin-on filter assembly for filtering engine coolant has a transparent plastic container attached to a cover plate by an annular joint. The annular joint is formed by an annular trough in the cover plate, which annular trough has a lip which overlies a radial flange on the transparent plastic container. A filter element is disposed within the container and is urged by a coil spring against an end plate which abuts the cover plate. The end plate has a threaded central outlet opening and a plurality of spaced inlet openings which are accessed through a recess in the cover plate. The spin-on filter assembly is mounted in the coolant system of an internal combustion engine by a hollow threaded stud.

Abstract: A unique cylindrical filter assembly (10) having a flow path in one end (31) through a filter media (18) and out the other end with the inlet (12) and the outlet (14) disposed on the longitudinal center line of the cylindrical filter assembly (10) and with the filter media (18) having an elongated annular shape and being disposed around a center chamber (34). Filter assembly (10) includes a pressure relief valve (22) positioned in the center chamber (34) near the inlet port (12) so when the pressure relief valve (22) opens liquid flows directly into the center chamber (34). A housing member (40) can be provided which covers the outlet end (14) and includes louvers (42) for dispersing the liquid as it exits the filter (10).

Abstract: A method and device for removing waste oil from a cartridge-type oil filter with the filter including a plurality of openings formed therein in a predetermined pattern and an oil retention gasket disposed within the filter. The device includes an elongate body portion formed of resilient, bendable material defining a longitudinally extending central body formed with a predetermined lengthwise dimension sufficient to span a distance between two of the openings and two end portions formed integrally with the central body and projecting oppositely outwardly therefrom with the end portions being sized to fit within the openings and being of a sufficient lengthwise dimension to engage and displace at least a portion of the gasket to allow waste oil to be poured or otherwise drained from the filter cartridge.

Abstract: A fluid filter cartridge is disclosed herein. The filter cartridge includes a generally tubular casing closed at one end and having at the opposite, open end, an annular member defining a filter element receiving aperture and provided with a single seal extending circumferentially of the casing and projecting axially away from the casing. The filter element includes a base ring and a generally tubular filter screen extending from the base ring to an end closure therefor. The base ring and tubular filter screen are dimensioned to fit within the filter receiving aperture. A removable connection is provided between the annular member and the base ring whereby the filter element is removably retained in the casing after rotation of the filter element about its axis relative to the axis of the casing.

Abstract: A filter canister assembly for receiving waste from a dental cuspidor includes a canister of generally conventional configuration, with an open upper end, fitted with a canister closure which engages with the upper end of the canister and which is secured to a disposable filter configured to fit within the canister. Embodiments are described wherein the canister closure is disposable and is permanently attached to the disposable filter; wherein the canister closure is snapped together with the filter; and wherein the filter itself has an annular ledge which seats with different sizes of canister, with the closure snapped into the upper end of the filter.

Abstract: A filter having a an outer peripheral surface comprising an accordion wire mesh and an inner peripheral surface comprising a support structure, the filter permitting a liquid composition such as paint to be filtered therethrough when connected to an airless paint spraying system. Method of using a filter.

Abstract: A resilient molded gasket adapted to be received in a preformed annular groove having an inner sidewall formed at an oblique angle relative to the base of the groove and having an enlarged area defined at the junction of the inner sidewall and the base. The gasket includes a generally circular body and at least two integrally molded tabs. The body is sized to be slidably received in the groove. The tabs are adapted to engage and then snap past a lip formed on the free end of the inner sidewall and then to be received in the enlarged area of the groove so as to retain the gasket in the groove while permitting rotation of the gasket.

Abstract: A spin-on filter includes a baseplate secured to an end cover and further includes a filter element disposed in a canister having an open end. The end cover is secured to the open end of the canister by seaming a flange formed at the edge of the end cover with a flange formed at the end of the canister. An end cap which is secured to the filter element is trapped between the baseplate and the seamed flanges, thereby securing the filter element in the canister and avoiding the need of a helical spring for urging the filter element toward the baseplate.

Abstract: The filter includes an end plate stamped and drawn from sheet metal and formed with four upright walls generally defining a square and having inlet openings therein. Relatively deep gussets are located between the walls for strengthening purposes. Located outwardly of the walls and gussets is a flat peripheral portion of relatively small area and defining a flat surface to which a sheet metal retaining ring is welded. The ring is seamed to the canister of the filter by a hem which hooks beneath a short radially extending lip of the canister.

Abstract: A dual-flow lubricant filter assembly having a bypass filter element with a full-flow filter element stacked thereon includes a grommet disposed between the filter elements for isolating lubricant streams after the lubricant has passed through the filter elements. The grommet is molded of a resinous material and includes an external flange which is sandwiched between the bypass and full-flow filter elements in order to axially position the grommet. The grommet also includes an internal flange which seals with an unthreaded portion of a standpipe with which the filter assembly is coupled.

Abstract: A device for treating and conditioning engine coolant for use with an internal combustion engine includes a housing having an inlet and outlet and a filtering media and container carrying coolant treatment material located within the housing. Coolant passes through the filter, and then is exposed to the tip of a rod which erodes away to permit treatment material to be discharged in the coolant. As the corrosiveness of the coolant decreases, erosion of the rod is discontinued, so that additional treatment material is no longer discharged into the coolant. Accordingly, the corrosiveness of the coolant is controlled to within relatively narrow limits.

Abstract: A self-cleaning canister type filter (1). A cylindrical canister enclosure (3) has, at one end, end plate (2) with fluid inlets (4) and outlet (6) therein. A spring-loaded hollow annular piston (30) is slideably mounted on the exterior of central tubular cylinder (10) and within upper cylinder (28) for a downward movement against compression spring (32) to initially force a back-flow of filtered fluid through filter element (14), lifting contaminant particulate solids from its filtering surface (15). Inlet valve opening (64) is opened to fluid flow when piston (30) attains a compressed position. Filter element (14) is closely spaced to canister enclosure inner wall surface (9) for rapid flow of fluid over the inlet surface (15) of the filter element (14) to scour solids to sump (5) in the lower portion of the canister enclosure (3).