Parker-hannifin Corporation

Parker Hannifin Customer Support Inc.

David H Hodgkins

Michael D Clausen

Peter Popoff

Walter H Stone

Russell David Jensen

Victor R Oelschlaegel

Victor A Oelschlaegel

John F Church

Jeffrey H Granville

Dale M Giva

A fuel filter assembly (,) has a head portion (,) and an element portion (,) enclosing a replaceable cartridge (,). The assembly has a first inlet port (,) which accepts fuel from a tank (,) and filters it by passage through a screen (,) supported on a tube (,). The fuel that has been filtered by passage through the screen is delivered from the assembly through a first outlet port (,) for delivery to a lift pump (,). Fuel from the lift pump is returned to the fuel filter assembly through a second inlet port (,). The fuel is finely filtered by passage through a loop of filter media (,). Clean fuel is delivered from a second outlet port (,) to an engine (,). Contaminants separated from the fuel by passage through the screen and the media loop are collected in first-and second sump areas (,), (,) of the filter housing respectively. An alternative embodiment (,) includes a prefilter screen (,) integral with a replaceable cartridge (,).

Double pass fuel filter assembly

A filter assembly includes a replaceable filter element disposed within a filter housing. The housing includes a removable cover, and a fitting including an internal central conduit extending along the central axis of the housing. The central conduit is bisected along its length and has a pair of flow channels connected to a pair of ports in the fitting. Another port is provided in the fitting and a still further port is provided in the housing. The filter element includes a first circular imperforate end cap, and a second annular imperforate end cap dimensioned to receive the central conduit. First and second filter media loops are supported between the first and second end caps. An imperforate cylindrical wall is radially disposed between the first and second filter media loops. Annular seals are provided around the opening in the second end cap, at the inner end of the first filter media loop, and at the inner end of the cylindrical wall. The seals provide a fluid seal against the central conduit when the filter element is installed in the housing to fluidly separate two flow paths through the housing.

Dual pass fuel filter assembly and element therefor

A fuel filter comprises a head (,) having an inlet (,) and an outlet (,). The head is connected to an element (,) by a nipple portion (,) which has a valve element (,) therein. An actuating projection (,) is engageable with the valve element to open flow through said nipple portion when the correct element is attached thereto. The actuating projection is further supported on a central portion (,) which prevents connection to a nipple portion that extends too far into the element. According to a further embodiment, the filter includes a housing (,) with a removable element (,) mounted therein. The housing has an inlet port (,) in direct fluid communication with a chamber (,). The outlet port (,) is in direct fluid communication with a central standpipe (,). The standpipe has a flow element (,) movable therein for controlling the condition of flow openings (,) in the standpipe. The cover further includes a cover projection (,) for supporting a projection (,) on end cap (,) of the filter element, which opens flow into the standpipe only when the element is installed. A centering wall (,) is also provided on the cover which is received within a recess portion (,) of a well area of the end cap (,). The removable element can include first and second filter media rings (,) where fluid is introduced between the rings and flows radially inward through the first media to a first outlet (,), and radially outward through the second media ring to a second outlet (,).

Fuel filter assembly with standpipe having valve element

A fuel filter comprises a head (96) having an inlet (100) and an outlet (102). The head is connected to an element (266) by a nipple portion (186) which has a valve element (196) therein. An actuating projection (222, 272) is engageable with said valve element to open flow through said nipple portion when the correct element is attached hereto. The actuating projection is further supported on a central portion (220, 276) which prevents connection to a nipple portion that extends too far into the element. According to a further embodiment, the filter includes a housing (412) with a removable element (424) mounted therein. The housing has an inlet port (414) in direct fluid communication with a chamber (418). The outlet port (416) is in direct fluid communication with a central standpipe (422). The standpipe has a flow element (442) movable therein for controlling the condition of flow openings (436) in the standpipe. The cover further includes a cover projection (482) for supporting a projection (478) on end cap (460) of the filter element, which opens flow into the standpipe only when the element is installed. A centering wall (486) is also provided on the cover which is received within a recess portion (704) of a well area of the end cap (460). The removable element can include first and second filter media rings (426, 716) where fluid is introduced between the rings and flows radially inward through the first media to a first outlet (416), and radially outward through the second media ring to a second outlet (710).

Fuel filter with dual flow

A fuel filter comprises a head (96) having an inlet (100) and an outlet (102). The head is connection to an element (266) by a nipple portion (186) which has a valve element (196) therein. An actuating projection (222, 272) is engageable with said valve element to open flow through said nipple portion when the correct element is attached hereto. The actuating projection is further supported on a central portion (220, 276) which prevents connection to a nipple portion that extends too far into the element. According to a further embodiment, the filter includes a housing (412) with a removable element (424) mounted therein. The housing has an inlet port (414) in direct fluid communication with a chamber (418). The outlet port (416) is in direct fluid communication with a central standpipe (422). The standpipe has a flow element (442) movable therein for controlling the condition of flow openings (436) in the standpipe. The cover further includes a cover projection (482) for supporting a projection (478) on end cap (460) of the filter element, which opens flow into the standpipe only when the element is installed.

Fuel filter with valve device

A fuel filter assembly includes a housing (12) with a removable element (24) mounted therein. The housing has an inlet port (14) in direct fluid communication with a chamber (18). The outlet port (16) is in direct fluid communication with a central standpipe (22). The standpipe has a flow element (42) movable therein for controlling the condition of flow openings (36) in the standpipe. The element includes projections (88) for engaging recesses (90) in a cover (28) to selectively latch the element and cover together. The cover further includes a cover projection (82) for supporting a projection (78) on end cap (60) of the filter element, which opens flow into the standpipe only when the element is installed. When the element is removed, the flow element prevents the introduction of contaminants into the standpipe.

Fuel filter assembly with replaceable element

A fuel filter assembly (10) has a head portion (12) and an element portion (14) enclosing a replaceable cartridge (18). The assembly has a first inlet port (22) which accepts fuel from a tank (90) and filters it by passage through a screen (43) supported on a tube (36). The fuel that has been filtered by passage through the screen is delivered from the assembly through a first outlet port (24) for delivery to a lift pump (96). Fuel from the lift pump is returned to the fuel filter assembly through a second inlet port (26). The fuel is finely filtered by passage through a loop of filter media (60). Clean fuel is delivered from a second outlet port (28) to an engine (104). Contaminants separated from the fuel by passage through the screen and the media loop are collected in first and second sump areas (78), (80) of the filter housing respectively. An alternative embodiment (110) includes a prefilter screen (158) integral with a replaceable cartridge (118).

A filter assembly includes a base and cover member which together enclose a planar filter element. Each of the base and cover members has a planar face with a central overpressure opening for an overpressure valve, and a radially-extending channel extending from a port on the side of the base or cover member radially inward to the central overpressure opening. The channel is open along the surface of the planar face. According to a first embodiment, a plurality of radially-extending ribs are disposed in even, spaced-apart relation around the planar surface. The ribs define radial fluid flow paths for even distribution of fluid across the planar face, as well as support a surface of the planar filter member. According to one aspect of this embodiment, a central support rib is suspended along the open side of the channel, and is attached at its radially outer end to an outer annular frame, and at its radially inner end to a ring surrounding the central opening. One or more support trusses intersect the central support rib to add rigidity and strength to the rib. According to another aspect, one or more trusses extend substantially perpendicular to the radial channel for support of the filter element along the channel. According to another embodiment of the present invention, a plurality of cylindrical posts extend outwardly from the planar surface to provide fluid flow paths across the planar surface and for support of the filter element. One or more of the posts are disposed along the side edges of the radial channel or a central rib is provided along the channel for support of the filter element along the channel.

Oil filter assembly with support for removable planar filter

Fuel filter assembly with replacement element

A head (10) for mounting a replaceable spin-on fuel filter element (12) for use in a vehicle fuel system, includes an inlet (18) and outlet (76). The inlet is connected in the head to a second chamber (24) through a first check valve (26). The first check valve enables flow only from the first chamber to the second chamber. The second chamber includes a manually actuated pump (28). The second chamber is connected to a fluid in-flow area (64) of the element through a second check valve (62). The second check valve enables flow only from the second chamber to the in-flow area. The first chamber is also connected to the in-flow area of the element through a third check valve (84). The third check valve enables flow only from the first chamber to the in-flow area of the element. To remove air from a newly installed element and to prime the fuel system of the vehicle, the manual pump is cycled. The pump moves fuel from the inlet of the head through the first check valve, second chamber and second check valve, pushing fuel and air through the element to the outlet. When the manual pump is used, the third check valve remains closed. When the engine of the vehicle is started, vacuum is drawn on the outlet of the head. Fuel then flows directly to the in-flow area of the element from the first chamber in the head through the third check valve, bypassing the pumping means.

Filter head with integral priming pump and valved bypass passage

A fuel system for a diesel truck has a first fuel tank (80) and a second fuel tank (82). A siphon line (90) is open to the lower portions of the tanks and extends above the upper portions of both tanks. A manually operated priming pump (98) is used to remove air from the siphon line. Fuel is delivered from the first tank to the engine of the truck through a fluid delivery line (84). As fuel is drawn from the first tank, the fuel levels in the tanks equalize as the result of flow through the siphon line. Fuel not consumed by the engine is returned through an overflow line (86). The returning fuel is warmed as a result absorbing energy during pumping and having been in close proximity to the engine. A three-way control valve (88) directs the warm returning fuel to either the first or second fuel tank in response to the temperature sensed by a temperature sensor (94). In winter, the system operates to keep the fuel delivered from the first tank to the engine warm, and in summer prevents the fuel from becoming too hot.

Fuel system for diesel truck

A fuel tank venting system for a boat (10) includes a fuel tank (12) the interior of which is open to a filler tube (14) and a vent line (18). A liquid separation and recovery device (20) is connected to the vent line and an outlet line (28) which is open to atmosphere. Vapor delivered to the device through the vent line enters an inlet (24) and passes through an opening (64). The vapor then passes through a screen (86), around a sphere (82) that is buoyant in the liquid fuel, and escapes from the device through an outlet (26). When liquid fuel enters the device, the sphere rises blocking flow to the outlet. The trapped liquid passes through an opening (48) into a cavity (42). The liquid entering the cavity displaces a spring loaded piston (56). When liquid is no longer being delivered to the cavity, the piston pushes the liquid back out the inlet and down the vent line to the fuel tank. In excess pressure situations, when liquid is being delivered to the device, a movable member (66) is displaced upward opening a flow path to the outlet of the device through a second chamber (62). Once the over-pressure condition has subsided, the movable member returns to its original condition to prevent the passage of liquid through the device.

Liquid separation and recovery apparatus for fuel tank vent line

A vent line separator (30) having a housing (34) defining an interior chamber (44) having a flow diverter (132) positioned therein that separates liquid and gas and a by-pass valve assembly (106) that permits gas to be vented to the atmosphere under a predetermined minimum pressure, that prevents gas and liquid from being vented to the atmosphere when the liquid pressure in the interior chamber (44) is above a predetermined minimum pressure and below a predetermined maximum pressure, and allows venting of liquid fuel and gas to the atmosphere when liquid pressure in the interior chamber (44) is above a predetermined maximum pressure.

Growing community of inventors

Modesto, CA, United States of America

David H Hodgkins