Abstract: A liquid filter assembly comprises a filter cartridge and a filter head in fluid communication with the filter housing. A filter media construction is positioned within the housing. The filter media construction, in combination with the housing, defines an unfiltered liquid volume and a filtered liquid volume. The filter head includes an inlet for conveying liquid to the unfiltered liquid volume, a first outlet for conveying liquid from the filtered liquid volume, and a second outlet. A first valve assembly is provided which is constructed and arranged to selectively permit passage of liquid from the unfiltered liquid volume through the second outlet, in response to a first selected liquid pressure level within the unfiltered liquid volume.

Abstract: A twist-on renewable filter comprising a one-piece hollow housing, made of polymeric material having a threaded adapter for attachment to a distribution head assembly. The filter housing is fabricated from components that are made of a polymeric material that are fused together to form the one-piece hollow housing. A filter media assembly is rigidly bonded at both ends within the housing. The renewable filter has an infinite life and can be removed and cleaned, for example, by reverse flushing the filter with a cleaning solution. A bypass valve 250 is provided within the filter that is designed to provide full closure for an infinite life. The bypass valve 250 is fully located within the one-piece hollow housing such that it cannot be disabled or tampered with. The bypass valve 250 functions to allow sufficient fluid to bypass the filter media when the filter media has become contaminated and will not permit the full volume of the normal oil stream to be filtered.

Abstract: A filter for filtering the lubricating oil in an internal combustion engine. The filter comprises a housing (10) having an unfiltered oil inlet and a filtered oil outlet. A filter element (16) is disposed in the housing (10). A cover (13) is provided with a safety element (20) which effectively prevents the housing (10) from being closed by the cover (13) if the filter element (16) is missing. The safety element is a tipping member affixed to the housing or the cover and which tips under the force of gravity into a blocking position when the filter element is missing.

Abstract: A bilge water filtration system for removing petroleum-based liquid contaminants from the bilge water as it is being pumped from the bilge to a bilge water discharge outlet in the hull of a marine vessel, such as a boat or yacht. The filtration system employs filtration media enclosed in a modular unit equipped with a fill tube, such that media can be readily installed in the system, and then later removed to allow for subsequent destruction or recycling of the contaminants trapped by the media. The filtration system of this invention is adapted to be installed in-line with an existing bilge pumping system on boats and yachts of practically any size, and without requiring special modifications to the pumping system. In addition, the filtration system does not impede the operation of the bilge pumping system, but allows the flow bilge water to flow from the boat's bilge at conventional flow rates and with a minimal pressure drop caused by the filtration system.

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 quick disconnect filter assembly and manifold assembly for use in a photographic processor having a recirculating system designed for receiving a filter assembly in line. The filter assembly comprising: a housing having an internal chamber, a chamber inlet for allowing processing fluid to flow into the internal chamber and an chamber outlet for allowing processing solution to flow out of the internal chamber. The housing has a quick disconnect valve for allowing quick connection and disconnecting of the filter assembly with the recirculating system without any substantial loss of fluid. The manifold assembly comprising: a body having an inlet port and an outlet port and a fluid connecting passage therethrough connecting the inlet to the outlet. A wall member is provided for dividing the connecting passage into a first receiving section and an outer delivery section.

Abstract: A filter assembly has a housing for supporting a filter element, a first quick connect sealing valve operatively connected to an inlet passageway in the housing, and a second quick connect sealing valve operatively connected to an outlet passageway in the housing.

Abstract: A water filter including an inlet assembly which comprises a prefiltering foam tip. The inlet hose includes an adjustable float and a weight on the end of the hose which allows a given length at the end of the inlet hose to extend below the surface of the water being filtered. The water filter further includes a check valve assembly to relieve pressure buildup inside the pump. A unique lever-action handle, in combination with a rocking piston, allows efficient filtering with few moving parts. The filter components are easily replaceable. The main filter assembly is suspended resiliently at its periphery to provide shock-absorbing characteristics. The filter also includes an adaptor base which allows for a direct connect between the vessel into which water is filter. The water filter also provides a unique method of storing the inlet hose to render the water filter easy to carry and prevent foreign objects and debris from entering into the area of working parts.

Abstract: A filter arrangement for a single acting, telescopic, hydraulic cylinder, useful to raise and lower a dump truck bed, is configured for installation in one line of a two-line dump pump to filter only hydraulic fluid returning to sump. This is accomplished by a first one-way check valve which blocks fluid flow through a filter element toward the hydraulic cylinder but allows fluid flow from the hydraulic cylinder to sump and a second one-way check valve, disposed in parallel with the filter element, to block flow to the sump from the hydraulic cylinder while allowing flow from the sump to the hydraulic cylinder so that returning hydraulic fluid passes through the filter element. Preferably the filter element is disposed in a spin-on filter assembly which includes the one-way check valves integral therewith.

Abstract: A filter head adapted for use with spin-on filters is shown. The filter head carries a spring load piston which is normally biased to close a filter bypass channel. A fluid pressure increase caused by a clogged filter causes the piston to move opening the bypass and at the same time opening a signal channel between a source of fluid pressure and a signal outlet.

Abstract: A new and improved engine coolant filter for removing particulate matter such as scale and rust from an internal combustion engine cooling system, the engine coolant filter comprising a filter element wherethrough coolant fluid may be circulated, the filter element including a housing having an input aperture and an output aperture, the housing also having filter medium disposed between the input aperture and the output aperture wherethrough coolant fluid may flow, and a manifold installed in series with a pressurized coolant line, the manifold having an input port and an output port, the manifold being removedly connected to the filter element such that coolant fluid flowing into the input port is circulated through the filter medium then out the output port, the manifold also having an automatic clogged-filter bypass valve whereby an unacceptable pressure differential across the ports caused by clogged filter medium shunts the coolant fluid around the clogged filter medium, the manifold further having a vis

Abstract: A filter unit comprises a housing containing a filter element. The housing includes an inlet for fluid and an inlet passage which passes fluid to the filter element. An outlet passage conveys filtered fluid from the element to an outlet to the housing. The inlet passage includes a valve which can close the inlet passage. When this happens, a by-pass valve opens and connects the inlet to the housing direct to the housing outlet. An anti-backflow valve is provided in the outlet passage to prevent fluid passing back down the outlet passage to the filter element. The filter element can then be changed. A re-pressurization valve is provided to pass fluid to the element while the inlet passage is still closed and a vent port vents air from the element during this re-pressurization. Once re-pressurization is complete, the vent port and the re-pressurization valve are closed and the inlet valve opened so that filtration recommences.

Abstract: A system for removing hazardous contaminants such as radon gas and volatile synthetic organic chemicals from domestic water supplies includes a perforated, horizontally-oriented tray which is baffled to define a curved (e.g., serpentine, spiral) liquid flow path. Contaminated water is distributed upon a portion of the tray and flows as directed by the baffles to a downcomer and into a storage tank. Air is blown into the storage tank, which is located below the perforated tray, and up through the perforations. The forced air causes the water flowing across the tray to froth, and evaporates the contaminants out of the frothing water. The forced air, carrying the volatilized contaminants, is then vented outside the home.

Abstract: A water filter assembly for use with a shower bath comprises a housing containing a filter and a bypass adapter which allows the filter to be displaced, e.g. downwardly, from the direct line leading from the water source to the shower head. The housing is also preferably adapted to hold containers for cosmetics or the like. Several forms of containers, particularly adapted for use in such a holder, are disclosed. Also disclosed are several preferred forms of filter adapted for this use, as well as improved quick disconnect type couplers allowing simultaneous operation of two adjacent such couplers.

Abstract: Single-piece manifold for use in pressurized painting equipment which is configured and arranged for joining a liquid inlet line, a pressure sensor, a filter, a pressure relief valve, and one or more liquid outlet lines by a streamlined network of passages in a compact and organized manner which eliminates static flow areas. The pressure sensor is assembled within the manifold in such manner as to avoid relative rotation between sensor components and thus avoid stressing electrical leads of the sensor.

Abstract: A liquid filter for filtering the lubricating oil of an internal combustion engine includes a bypass passage permitting liquid to flow from the outlet to the inlet in a direction opposite to normal flow through the filter when the engine is initially filled with oil by a pressure lubrication fill process. When the engine is first started, a valve responds to normal engine oil pressure to close the bypass passage.

Abstract: A friction-reducing lubricating-oil filter for Internal Combustion Engine and in which a solid-lubricant-feeding equipment is equipped on the lubricating-oil duct where the lubricating-oil has been finely cleaned and has not got to the friction parts, which is wholly sealed and is filled with solid lubricant, on which there are several holes evenly arranged; when the lubricating-oil flows over the outside surface of said solid-lubricant-feeding equipment and said holes, because the static pressure of the flowing liquid is lower, the solid lubricant in the solid-lubricant-feeding equipment is drawn out through said holes and mixes with the lubricating-oil. This friction-reducing lubricating-oil equipment doesn't need any other driving equipment and can transfer the solid lubricant to the friction parts without filtering out by the filter, and therefore is not only simple in structure, but also very effective in friction-reducing.

Abstract: The invention relates to a filter apparatus for filtering oil in particular. The object is to provide a filter apparatus reliable in operation and simple in construction. A spring-loaded (22) valve plate (18) is provided at one end (5) of a casing surrounding a tubular filter cartridge (2). The valve plate comprises, at a distance from its outer edge, an annular cutting edge (19) sealing against the end (5) of the casing. Oil flows radially inwards through the filter cartridge (2). When the filter (2) is gradually blocked by impurities, the pressure of the oil rises outside the filter cartridge. This pressure acts on an annular surface (31) between the outer edge and the sealing cutting edge (19) of the valve plate. When the pressure rises sufficiently, the valve plate is displaced away from the end (5) of the casing, whereby oil may flow through the connection so obtained past the filter (2) directly into its central cavity (11).

Abstract: In order to facilitate release of a filter by-pass valve (10) for filter element replacement in relatively inaccessible locations, the valve (10) includes a housing (12) defining a filter chamber (14) having an inlet (16) communicating with the filter chamber (14) at one end (18) of the housing (12) and an outlet (20) communicating with the filter chamber (14) at the other end (22) of the housing (12). An integral filter-valve assembly (24) is removably positionable within the housing (12) between the inlet (16) and outlet (20). The filter-valve asssembly (24) supports a filter element (26) within the filter chamber (14) in a manner defining a primary flow path from the inlet (16), through the filter element (26), and to the outlet (20). The filter-valve assembly (24) also includes a by-pass valve (28) defining a secondary flow path from the inlet (16) to the outlet (20).

Abstract: A filter head assembly includes a relief valve assembly therein, and is adapted for use in a spin-on filter or the like. When the relief valve assembly is in a closed mode of operation, fluid flow through the filter head, and an associated filter, results in conventional filtration. When the relief valve assembly is in open mode of operation, the filter is substantially bypassed permitting fluid to flow directly through the filter head, with filtration. The relief valve assembly includes a movable piston member therein, which opens and closes for the respective flow passage outwardly from a lateral takeoff port. Any substantial, undesirable, lateral forces acting upon a piston member may be substantially reduced by means of a lateral pressure release system provided according to the present invention. Generally, the lateral pressure-relief system comprises an annular recess formed in the piston member.

Abstract: A filter unit including a housing element having a first and a second inlet for fluid and a first and a second outlet for fluid, flow passages defined in the housing defining a first path of flow for fluid between the first inlet and the first outlet of the housing, a flow passage defined in said housing defining a second path of flow for fluid between the second inlet and the second outlet of the housing, and a filter member in housing being capable of filtration to remove particles of dimensions greater than 5 micrometers, the second path of flow including a path through the filter and a by-pass about the filter having a resistance to flow of fluid no greater than that of the filter whereby in normal use a proportion only of fluid passing through the second flow path passes through the filter, provides fine filtration for an internal combustion engine and is attachable to a conventional engine filter mount.

Abstract: A filter comprises a housing and a filter body including a plurality of grooved filter discs supported in stacked relation on a plurality of rods extending longitudinally of the housing, the rods being supported at their opposite ends by the housing and being disposed in an array around the housing longitudinal axis with spaces between the rods to provide large passageways for the flow of the fluid. The filter further includes a stack--removing member disposed at one end of the filter discs, and a handle to facilitate drawing the filter discs out of the housing, when opened for cleaning purposes, without breaking the stack.

Abstract: A device using intentionally introduced centrifugal force to direct particles suspended in a liquid to peripherally arranged contact members and to detain them there through the static pressure caused by the peripherally moving liquid.The device separates the ferrous, magnetizable, from the nonferrous, not magnetizable, particles by providing a magnetic capturing unit having a diameter smaller than that of the aforementioned contact member arrangement, so that ferrous particles will be retained by magnetism and so indicated, while nonferrous ones will be detained by the radially more outwardly located contact members and indicated accordingly. Individual indications of, especially nonferrous particle accumulations, are provided for at least two particle magnitude ranges.

Abstract: The fluid valve assembly includes a hollow movable valve having an open-ended tubular fluid filter in the longitudinal bore of the valve and overlying transverse fluid discharge passages in the hollow valve to filter fluid before it flows through the transverse discharge passages from inside the valve. Downstream of the tubular fluid filter, the hollow valve includes one or more fluid metering passages which are moved relative to a valve seat to control a second flow of fluid from inside the valve. The increased fluid flow longitudinally in the valve bore when the valve is moved from the seat to effect the second fluid flow exerts a washing action on the tubular fuel filter to remove debris or foreign matter therefrom and carry same out through relatively large fluid passages not prone to clogging.

Abstract: The present invention is directed to a duplex filter apparatus which provides for a first primary filter path and a second path for secondary filtration. The first path includes a shutoff valve on one side of the primary filter and a check valve on the downstream side. The second path includes a regulating bypass valve on the upstream side of the secondary filter and a check valve on the downstream side. The regulating bypass valve gradually shifts fluid flow from the first path to the second path when differential pressure across the primary filter increases beyond a predetermined level. A reservoir return bypass valve directs fluid flow gradually from the secondary filter when differential pressure across the secondary filter increases beyond a predetermined level. Bleed valves are provided to relieve pressure on filter elements when the filter elements are isolated so that servicing may occur.

Abstract: A self-cleaning renewable fluid filter that flushes a permanent filter media while the used oil is pumped out by the engine oil pump through a drain in the housing. The fluid filter has an inlet and a drain, a center core with an outlet, a drain valve normally closing the drain, a permanent fluid filter media inbetween the inlet and outlet, a plug for closing the outlet, an actuator for opening the drain valve and an improved bypass valve which bypasses fluid and enables reversal of fluid flow through the filter media during draining for flushing the media. The preferred drain valve actuator is an electric solenoid coil inside of the filter and the improved bypass valve is an annular valve around the center core and inside of a cylinder formed in an inlet end cap of the filter media.

Abstract: A multiple-disc type fluid filter is described wherein the housing includes an outer tubular section, and an inner section having two tubular members with an end plate at one end of one tubular member and securable to an open end of the outer housing section. The two tubular members of the inner housing section include ribs for supporting the filter discs. The end plate and the tubular member to which it is secured are open and constitute one of the filter ports, e.g. the inlet port, and the opposite end of the same tubular member is closed and terminates short of the outer housing section. The second tubular member, which is longitudinally spaced from the closed end of the first tubular member, constitutes the other filter port, e.g. outlet port. The stack of filter discs are all of substantially the same uniform thickness, but there are included a plurality of further discs of non-uniform thickness such as to correct the accumulation of non-uniformities in the latter discs.

Abstract: A water filter connects into a waterline which feeds a faucet separate from the filter. A filter cartridge is seated within a canister and has an inlet and an outlet. The canister is removably attached to a cap in which is disposed an entrance port to communicate with the outlet and an exit port to communicate with the inlet. Also in the cap are an input port for receiving water from the line, an output port for delivering water into the line to feed the faucet, a passage which communicates between the input port and the exit port, a passageway which communicates between the input port and the output port and a channel which communicates between the entrance port and the output port. A diverter in the cap responds to a rate of water flow from the faucet of less than a predetermined amount for opening the passage and the channel and closing the passageway, while being responsive to a rate of flow greater than such amount for closing the passage and the channel but opening the passageway.

Abstract: The subject invention relates to a filter apparatus for separating fluids of varying density. The subject filter is particularly adapted for use with diesel engines. The apparatus includes a new and improved baffle system which increases the separation of fluids. In addition, a unique filter cartridge is disclosed which is readily replaceable. The cartridge also functions to reduce the likelihood of the formation of air pockets.

Abstract: An oil filter apparatus including a disc element (16) operable to be releasably mounted between a conventional oil filter cannister (14) and a machine (10) to be lubricated. The disc element has generally mutually parallel and opposing end surfaces (50, 52) operable to be mounted between the machine and the oil filter and abut against and sealingly engage with compatible surfaces on both members. The disc element (16) includes a first disc passage (56) extending between the opposing surfaces of the disc and being in fluid communication between a first oil passage (3) carrying oil under pressure within the machine to be lubricated and the inlet side of an oil filter element. A second disc passage (58) extends between the opposite surfaces of the disc and is in fluid communication with an oil outlet port (40) of the filter element and a second oil passage (42) of the machine downstream of the first oil passage.

Abstract: A filter assembly with an inner housing and filter element mounted within an outer housing, and with first and second poppets carried on a shaft in said inner housing forming first and second valves. The filter assembly has a normal flow path from the outer housing inlet through the filter element and into the inner housing past the first poppet valve and then out the outlets from the inner housing to the outer housing. A bypass flow path is provided through the filter assembly when the filter element is blocked or dirty. In the bypass operation, the increased pressure differential between inlet and outlet causes operation of the second poppet valve providing a flow path from inlet to outlet bypassing the filter element. A reverse flow path is also provided by the second poppet valve to prevent flushing of the filter during reverse flow conditions such as occur when the filter assembly is utilized in conjunction with a hydraulic motor.

Abstract: A filter assembly is provided having a filter bowl assembly attached to a filter head in a manner that allows jacking of a filter cannister into and away from sealing engagement with the head, comprising, in combination, a filter head; an inlet for unfiltered fluid and an outlet for filtered fluid in the head; and a filter bowl assembly comprising a filter cannister; a filter element removably disposed in the filter cannister across the line of fluid flow from the inlet to the outlet so that fluid flow from the inlet to the outlet normally proceeds through the filter; a jack ring removably attached to the head; and means attaching the filter cannister to the jack ring in a manner to jack the cannister onto the head into sealing engagement therewith when the jack ring is attached to the head, and off from the head when the jack ring is removed from the head, so that the cannister is jacked onto the head and off from the head by the jack ring for access to and replacement of the filter element in the cannister.

Abstract: A versatile filter structure adaptable for use in differently ported configurations includes accommodation for variations of bypass and shutoff valving and for filter element replacement from either end or centrally of the structure. A head casting is secured to a tubular housing and either may be the mounting device for the filter. A funnel shaped diverter having an oblique edge is removably mounted in the head casting and provides separation between inlet and outlet portions of the filter structure by means of an eliptical O-ring seal at the edge which engages the interior of the head casting. The diverter provides a smooth transition for fluid flow to the interior of the filter, supports one end of the filter element in the tubular housing, optionally houses a shutoff valve operative automatically upon filter element removal, and further houses a bypass valve for safeguarding against filter element blockage.

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: A reverse osmosis water purifying device is provided with a flush water restrictor which serves to provide a suitable back pressure on the reverse osmosis membrane in order to affect the purification process. The device is designed for attachment to any source of pressurized water. The restrictor device consists of a capillary tube sized to provide a suitable ratio of flush water to purified water. A ball-type check valve surrounds the capillary tube at its point of exit and the ball valve may be dislodged in order to flush the membrane. The core of the membrane assembly is filled with activated charcoal in order to provide for a more efficient and complete purification.

Abstract: A filter assembly utilizing a plurality of stackable filter head units which permit parallel flow through filter elements mounted within filter bowls, there being one filter element and filter bowl mounted on each of the stackable filter head units. An improved filter head construction is employed which permits a plurality of substantially identical filter head units to be mounted adjacent each other to provide the desired flow capacity, each of the filter head units being so designed that it can be readily manufactured.

Abstract: A Poppet valve is disclosed of the type in which a valve member located in a flow passage is biased to the closed position on a valve seat, and in which an electrical indication is provided, when the valve seats or unseats, by an indicator circuit which includes a current path through the valve and valve seat which is opened and closed by seating and unseating respectively of the valve. The valve construction includes a conductive rubber seal which insures a positive seal while allowing the passage of electric current for activating the indicator circuit. In one embodiment, a thin metal contact washer is used in conjunction with the rubber seal to enhance its conductivity, the configuration of the contact washer allowing good sealing contact while greatly improving the contact conductivity.The indicator circuit activates an indicator device such as a panel light in response to the making or breaking of the current path caused by seating or unseating of the valve.

Abstract: A filter assembly comprises a housing having a tubular filter and a bypass valve mounted therein. The valve comprises a spool having pressure modulating means thereon in the form of a tubular extension having a plurality of metering orifices formed therethrough. In normal operation, fluid is communicated from an inlet of the housing, through the filter and to an outlet. When the inlet pressure of the fluid exceeds a predetermined level due to clogging of the filter, for example, the fluid is communicated from the inlet to the outlet directly, through the metering orifices of the valve. The spool has a cylindrical portion which forms a sliding seal with a cylindrical bore defined in the housing to prevent premature opening of the bypass valve.

Abstract: A filter apparatus having a main valve provided with a first portion, a second portion, and an auxiliary valve situated within the valve body adapted to open before an opening of the main valve. Another filter apparatus comprises a main valve and a by-pass valve overflowing the fluid when the fluid pressure in a filter chamber is high. Using the filter apparatus provided with check-valves incorporated in the filter apparatus, a fluid such as oil flowing through a piping system is automatically stopped and the filter element is purified or changed in a short time.

Abstract: Dual coaxial bidirectional valves are provided for use in fluid systems such as hydrostat systems where flow can proceed in opposite directions, and which direct flow through a unidirectional or multidirectional function such as a filter assembly in such a system in the normal direction, regardless of the direction of flow in the system. The valve includes two opposed coaxial valves intercepting and controlling flow through a box junction of the fluid line with the lines leading to and from the filter assembly, in a manner such that, regardless of the direction of flow in the fluid line, flow proceeds in the same direction in the connecting fluid lines to and from the function.

Abstract: A fluid filter has a fluid inlet, a fluid outlet, and a filter element in the fluid pathway, and is provided with a by-pass which includes a fluid pressure indicator. The by-pass comprises a cylinder attached to a cover and removable therewith. The cylinder has one aperture which provides fluid communication between the cylinder and the inlet and has another aperture which, when open, provides fluid communication between the cylinder and the outlet and hence provides a fluid pathway between the inlet and outlet which by-passes the filter element. A piston is movable within the cylinder responsively to fluid pressure from a first position where it closes the second aperture to a second position where the second aperture is open. The cylinder can be removed and mounted in a first position which provides both an indicating and a by-pass function or it can be rotated to a second position which provides only an indicating function.