Abstract: A drilling system for use in drilling a wellbore including a driving mechanism and a separation device disposed upstream of the driving mechanism. The separation device filters at least a portion of any solids from drilling media flowing through a filter flow path of the separation device. The separation device flushes at least a portion of the filtered solids through a flush flow path, through a flush outlet on an outer surface of the separation device, and into an annulus between the outer surface of the separation device and the wellbore. Optionally, the drilling system includes a second driving mechanism and a second separation device disposed above the second driving mechanism.

Abstract: One embodiment provides a control valve filter device, including: a belt-like frame body curved into a ring shape so that its ends face each other, the frame body having an opening; a filter member provided in the opening of the frame body; an engagement claw extended from one of each of both corresponding lateral portions of the faced ends of the frame body; and a concave portion provided at the other of each of the both corresponding lateral portions of the faced ends of the frame body, so as to be engaged by the engagement claw, each concave portion being formed laterally of the opening of the frame body.

Abstract: Disclosed herein is an end-cap structure of an oil filter for vehicles. The end-cap includes a base cap which has a hole in a central portion thereof, and a hook cap which is installed in the hole so as to be movable upwards or downwards. In this structure, a surface of the hook cap that comes into contact with the base cap when the hook cap moves upwards is a sealing portion. When the hook cap moves downwards, the sealing state is released and a bypass is formed. According to the structure of the present invention, since the sealing portion of the end-cap can be protected from heat, the quality of the product, the productivity, the economic efficiency, etc. can be enhanced.

Abstract: The fluidized bed processor of the present invention includes an internal filter assembly with a rack and a cartridge-type filter supported at the lower end by a bracket. The rack includes an elongated rod extending through the filter. An end cap is provided on the lower end of the rod for normal sealing engagement with the filter bracket. During normal operation of the processor, the upper and lower ends of the filter are sealed. During or after cleaning of the filter, the rack is lowered, and a spring separates the filter and support bracket from the end cap so as to create a gap for drainage of cleaning fluid.

Abstract: Debris adhering to the outer surface of a barrel-type fish screen is cleared by air bursts from a series of perforated air pipes positioned inside the outer foraminous shell of the screen, the perforations being holes with axes at an acute angle to the screen radius for efficient use of the air. Separately, the conical water collection manifold mounted inside the shell is open at its narrow end, with a valve mounted to that open end to control the opening. The opening prevents reduced water inflow at that end of the manifold, and the valve adjusts the access of the surrounding water to the opening, thereby allowing the manifold to be tuned to more closely approach a uniform distribution of axial water flow along the length of the collection manifold for different ambient conditions.

Abstract: A fluid filter is described, comprising a filter body defining a cavity for a filter element, a first end cap for fitting on one end of the filter body, having an integrated single piece anti drain back valve and seal, and a second end cap for fitting on an opposite end of the filter body, having an integrated two part relief valve and supports for the filter element, formed by a relief valve body and a relief valve disc.

Abstract: A liquid filter assembly is provided. The preferred assembly includes a serviceable filter cartridge having a primary filter section and a secondary or bypass filter section. The preferred assembly includes a bypass valve arrangement and a suction filter arrangement. A valve, to allow flow from an interior of the assembly to a reservoir if needed, is provided. Preferred serviceable filter cartridges are shown.

Abstract: A fluid filter is described, which includes a housing having a first end portion defining fluid inlet and fluid outlet areas, a filter media disposed in the housing, having inlet surfaces communicating with the fluid inlet and outlet surfaces communicating with the fluid outlet, and a relief valve assembly for selectively opening a filter bypass connecting the fluid inlet and the fluid outlet. The relief valve assembly has a media plug for anchoring it in the filter media, the media plug having a bypass aperture connecting to the fluid outlet, and a valve element secured to the media plug. The valve element has a valving portion cooperating with the bypass aperture in the media plug for resiliently closing the bypass aperture when an inlet fluid pressure is below a threshold pressure, and for opening the bypass aperture when the inlet fluid pressure is above the threshold pressure.

Abstract: A replaceable inside out flow filter element comprises an annular filter media structure; an upper end cap attached one end of the media structure; a lower end cap attached to an opposed end of the media structure, with an inner annular bypass mounting sidewall formed on the lower end cap; a bypass valve assembly secured to the inner annular bypass mounting sidewall and configured to communicate with the radial inner side of the annular filter media structure; and an annular bypass shield tube coupled to the bypass mounting sidewall and extending above the bypass valve assembly toward the upper end cap, wherein the inner annular bypass mounting sidewall and the annular bypass shield tube combine with the radial inner side of the media structure to define an annular particulate receiving area that extends about at least ½ of the length of the media structure from the lower end cap.

Abstract: A variable wash flow filter assembly includes guide that is operable to guide a wash velocity control cone between a minimal position and a maximum position. The guide defines at least one activation deltaP window downstream of a conical gap between the wash velocity control cone and a frusto-conical wash filter. The fuel flow through the conical gap and the activation deltaP window is operable to position the wash velocity control cone between the minimal position and maximum position to selectively split a fuel flow through an inlet into a burn flow through a thru flow port and a filtered flow thru the frusto-conical wash filter and filtered flow port.

Abstract: A filter element for filtering liquids or gases, having a concentrically arranged filter medium with zigzag pleats. The filter medium is provided with end disks on its axial end faces, each end disk having an inside that is connected to the filter medium and an outside that faces away from the filter medium. At least a first end disk carries a valve element which is situated concentrically inside the filter medium. This valve element includes a valve seat which bulges outward above the plane of the outer side of the end disk. The valve element includes a valve body which cooperates with the valve seat and which is arranged on the first end disk so that it is axially movable and is inside of and surrounded by the filter medium.

Abstract: A filter element is removably positionable within a filter housing defining a filter chamber for said filter element. The filter housing comprises a standpipe extending within the filter chamber. The filter element includes a tubular filter media circumscribing the standpipe, a first end cap supporting the filter media at one end thereof, a second end cap longitudinally spaced from the first end cap and supporting the filter media at the opposite end thereof, and a center tube extending between the first and second end caps. The center tube has at least one inlet opening therethrough, a bypass opening at a first end thereof adjacent to the first end cap and a standpipe opening at a second end thereof adjacent to the second end cap and through which the standpipe is adapted to be inserted longitudinally into the center tube.

Abstract: A liquid filter assembly including a first liquid filter; a second different liquid filter element; a housing and a relief valve. The liquid filter assembly forms a first liquid flow path having the first liquid filter element therein, and a second liquid flow path having the second liquid filter element therein. The first liquid filter element forms a mixing chamber in a center of the first liquid filter element for mixing the liquid filtered by the first liquid filter element and the liquid filtered by the second liquid filter element. The relief valve is configured to allow liquid to bypass the second liquid flow path to mix with liquid filtered by the first liquid filter element in the mixing chamber.

Abstract: A variable wash flow filter assembly includes a wash velocity control cone movable between a minimal position and a maximum position.

Abstract: A valve assembly that is useable with a fuel filter housing to control the flow of fuel through the fuel filter housing. The valve assembly comprises two primary parts that are connected together via a snap connection, and when the valve assembly is installed on the fuel filter housing, means on the fuel filter housing prevent disconnection of the snap connection. One or both of the primary parts of the valve assembly can be provided with a tamper evident feature that will indicate whether someone has tried to remove or disassemble the valve assembly.

Abstract: According to various aspects, exemplary embodiments are provided of valve apparatus and combination filter valve assemblies. One exemplary embodiment provides a combination filter valve apparatus suitable for filtering objectionable particulate matter from a fluid and for selectively occluding a fluid flow opening. In this exemplary embodiment, the apparatus generally includes an outer member, a sealing member, and filtration media disposed generally between the outer member and the sealing member. The filtration media may be configured to generally support the sealing member for resilient movement relative to a fluid flow opening between open and closed positions. In the open position, the sealing member may be spaced apart from the fluid flow opening. In the closed position, the sealing member may be in sealing engagement with and substantially blocking the fluid flow opening, thereby inhibiting the ingress of fluid into or egress of fluid out of the fluid flow opening.

Abstract: An oil filter assembly has a bypass valve and a cover formed with an orifice. In order to provide a simple contamination indicator for the oil filter, there is provided a deflection device that deflects an oil jet emerging through the orifice when the bypass valve is open on the outside of the cover. The oil jet can thus be deflected into a region observable through a filling orifice. A contaminated oil filter can therefore be reliably detected on occasion of a quick visual check, by observing the deflected oil jet.

Abstract: A “no filter, no run” filtration system that is designed to verify that an appropriate filter cartridge is installed. A flow control valve is provided on a standpipe to control the flow of fuel into the standpipe. The valve has a component that has a first position at which any flow through the flow passage past the valve is insufficient to permit engine operation, and a second position at which a greater amount of flow through the flow passage is permitted by the valve in an amount sufficient to permit engine operation, and the component rotates about the longitudinal axis when it moves from the first position to the second position and from the second position to the first position.

Abstract: A filter with installation integrity permits fluid flow only in a first installation condition and not in a second undesired or mis-installation condition, including improper alignment or mounting of a filter element in a housing, an incorrect replacement filter element, absence of a filter element, and an incorrect housing cover. A magnetically actuated valve has a piston controlling fluid flow according to installation condition.

Abstract: A valve having a body incorporating a filter The disclosure relates to a valve comprising a body defining a duct, a filter member defining filter passages and extending inside the duct, and a valve member mounted to move in the body between a closed position in which it closes the duct, and an open position in which it leaves the duct disengaged, the filter member comprising two filter portions having complementary profiles and secured respectively to the body and to a support element fastened inside the body in such a manner that the filter passages are defined between the facing portions of the complementary profiles.

Abstract: A filter cartridge with a valve actuating protrusion having a sliding surface that is configured to engage with a valve, with the sliding surface being tapered so that a first portion of the sliding surface that engages the valve is wider than a second portion of the sliding surface that engages the valve, and the sliding surface is configured so that the first portion engages the valve before the second portion. The valve, which can be in any fluid passage of a filter housing, includes a plurality of spring arms. Engagement between the spring arms and the sliding surface creates a lifting force which opens the valve.

Abstract: A filter with installation integrity permits fluid flow only in a first installation condition and not in a second undesired or mis-installation condition, including improper alignment or mounting of a filter element in a housing, an incorrect replacement filter element, absence of a filter element, and an incorrect housing cover. A magnetically actuated valve has a piston controlling fluid flow according to installation condition.

Abstract: The present invention teaches a pressure release protection device for automatic ground cleaning vehicles, comprising an air suction pipe, an airtight cover, an air relief valve, a spring, a filter screen, a filter screen holder, a crown bar, a floating ball, and a foam isolating bucket, wherein the filter screen holder is fixed connected to the upper wall of the waste water tank, and the filter screen is fixed connected to the filter screen holder; the foam isolating bucket is connected to the filter screen holder; the floating ball is disposed inside of the foam isolating bucket and is connected to the crown bar; the crown bar is installed into the central hole of the filter screen holder, and can slide up and down with the floating of the floating ball; said airtight cover serves to cover the top of the waste water tank; the air relief valve comprises a handle part and a tubular shank part, wherein the shank part is installed into the central hole of the airtight cover.

Abstract: One advantageous embodiment of the invention is a filter device (10) for filtering a fluid and providing three or more substantially continuous directions of flow therethrough. The filter device (10) includes a housing (12) having an entry port (18) and an exit port (20). The housing (12) has a filter medium (22) disposed therein for filtering the fluid that flows along a filtration-flow direction (24a) from the entry port (18) to the exit port (20). The filter medium (22) has a bi-directional valve (28) coupled thereto for selectively directing the fluid along a bypass-flow direction (24b) and a reverse-flow direction (24c) that is generally opposite to said bypass-flow direction (24b). The bypass-flow direction (24b) extends from the entry port (18) to the exit port (20) in bypass of the filter medium (22). Also, the reverse-flow direction (24c) extends from the exit port (20) to the entry port (18).

Abstract: A fuel supply for a fuel cell including a fuel container and an impurity removal cartridge connected to the fuel container, where both the fuel container and the impurity removal cartridge are integrated into a single unit.

Abstract: A fluid treatment system that includes at least one treatment module (“pod”) with rigid and impermeable inner and outer surfaces, and an annular center passage which is designed to provide an alternative flow path during the pod backwashing process. At least one chemical treatment media disposed in the interior portion of the pod. A riser extends upwardly through the pod so that the outer surface of the riser and the inner surface of the pod define the annular passage. At least one valve assembly controls the movement of a fluid within the annular passage. The pod is serviced by directing the fluid into the riser and then directing the fluid through the pod, a portion of the fluid flowing through the annular passage.

Abstract: A filter assembly including a primary flow passageway having at least one filter deployed therein and a secondary flow passageway having a bypass filter deployed therein is provided. The filter assembly further includes a bypass valve assembly configured to selectively open and close the secondary flow passageway when a fluid pressure is respectively above and below an adjustable, predetermined threshold value. Exemplary embodiments of this invention may be coupled to a drill string and advantageously utilized to filter drilling fluid downhole. Such embodiments tend to advantageously improve the filtering efficiency and safety of drilling operations.

Abstract: A filter element removably located in a housing having a central valve structure. The element has an end cap with a valve actuating portion. The valve actuating portion includes a cylindrical portion and an annular base projecting radially inward from the cylindrical portion. The valve actuating portion includes a plurality of thin, flat keys spaced around the annular base and projecting radially inward from the cylindrical portion and axially outward from the base. The keys engage the valve structure in the housing when the element is installed, and open up a flow passage through the housing.

Abstract: The invention relates to a filter, such as an oil filter for a combustion engine. The inventive filter includes a filter housing and a valve, such as a non-return valve, a filter bypassing valve or a drain valve, that is arranged in the filter housing. According to the invention, the valve body of said valve is arranged at a combination component which is provided with a connector for connecting at least one additional filter component, such as an additional valve or a filter inset, to the combination component.

Abstract: A combined filter element support and anti-prefill valve is used with an annular filter element having an annular filter media with a hollow core for filtering lubricating oil or fuel. The combined filter element includes a unitary body having an annular portion, wherein the annular portion has annular shoulder extending radially therefrom for supporting the filter element, and a sealing section which engages the end plate over a continuous location which is coaxial with the central spin-on opening. The unitary body has a radially extending plate portion having an axially positioned one-way valve unitary therewith, which valve opens in an axial direction toward the spin-opening. In a preferred embodiment, the one-way valve is configured by a pair of lips which normally abut along a line and separate when subjected to oil or fuel pressure.

Abstract: A liquid filter including a valve arranged in a supporting tube of a filter insert, in which the valve is fixed by a disk (60) which is oversized relative to a mounting opening (61), so that reliable sealing to the edges of the disk is facilitated. Use of the disk (60) simplifies the mounting of the valve.

Abstract: A unitary three valve filter element support is used in a filter cartridge in which the filter cartridge includes an annular filter element within a housing closed by an end plate having a central opening surrounded by an array of radial openings spaced a fixed radial distance from one another. The unitary support has an annular sealing lip for sealing with the end cap of the filter element, which sealing lip deflects under oil pressure providing a first valve to allow oil to bypass the filter element if the filter media of the filter element is clogged. A second valve is a dirty side anti-drainback valve that is provided by a radial flange projecting from the unitary body. A third valve is a clean side valve aligned with the hollow core of the annular filter element to prevent drainback of clean oil and to prevent refilling of the filter cartridge with used or unfiltered oil.

Abstract: A filter device includes a filter housing (10) in which at least two filter elements (12, 14) with differing filter grades of filter material (16) are arranged. The filter elements are partially separated from each other by a separating device (18), with a through channel (24) of predetermined cross-section for a hydraulic connection between neighboring filter chambers (20, 22),. The filter chambers arranged prior to the filter materials (16) in the flow direction of the fluids for filtering. The filter device permits a combination of main- and side-stream filters in the smallest possible space, whereby very good purity levels for the filtered fluid are nevertheless achieved.

Abstract: A ring filter element comprising a plug for, in particular, a lubricating oil filter of an internal combustion engine. Said ring filter element is provided for insertion into a filter housing comprising a filter housing pot and a filter cover that can be axially detached. When inserted in the closed filter housing, the plug seals an opening which is provided in the filter housing pot and which extends in the same axial direction as the plug. The aim of the invention is to provide a ring filter element of the aforementioned type that can be packed in a space-saving manner. To this end, the ring filter element comprises the following characteristics: the plug is mounted on the ring filter element in such a manner that it can be displaced along to same axis or parallel to the axis, and; said mounting permits the plug to move with the aid of an actuating means which acts, by contact, upon the lug from outside the ring filter element.

Abstract: A filter assembly includes housing enclosing a replaceable filter element. A support core is provided in the housing, and includes an extension and locking assembly. The element includes a ring of filtration media with a pair of end caps. The first end cap includes a central opening to receive the support core. The extension and locking assembly prevents the cover of the housing from being attached to the housing body without a proper filter element installed. The extension and locking assembly includes a bypass member and a locking member, which are in locking engagement when an element is absent in the housing. The second end cap includes internal protrusions which engage the locking member when the filter element is installed to disengage the bypass member from the support core, and allow the element to be inserted and the cover to be installed.

Abstract: A fuel filter includes a housing and a pipe in the housing. The pipe includes a central flow passage, an opening along the length of the pipe into the passage, and an exterior groove. A latch device with discrete fingers closely surrounds the pipe and is engageable with the groove to prevent the latch device from moving axially along the pipe. The latch device has an annular sleeve, radially-outwardly spaced from the fingers. A valve device surrounds the pipe and has a sleeve normally covering the pipe opening in the pipe. A filter element has an end cap with thin, flat keys. The keys project through the slots in the valve device and engage the sleeve of the latch device to unlock the latch device from the pipe, and also engage and move the valve device to uncover the opening in the pipe, when the filter element is inserted into the housing.

Abstract: The present invention relates to small vehicles such as lawn and garden tractors and more specifically to an oil filter cartridge or assembly usable with the transmissions of such vehicles. The cartridge is comprised of a filtering element, a strainer element and a by-pass valve. The by-pass valve is housed within the strainer element and is adapted to direct oil flow through the strainer element, but not the filter element when the oil viscosity is high and only through the filter element when the oil viscosity is low. In this way, the parasitic horsepower loss caused by routing oil through the strainer element at all times is eliminated. The cartridge is also housed within the transmission case to reduce mounting bracketry outside the transmission case and minimize the likelihood of insufficient oil supply available for the filter, pump and hydraulic system functions.

Abstract: A filter device and method for diaphragm type flush valves includes positioning the filter device in a cavity of the valve, between an inlet and an outlet pipe, and between an inlet and a bleed hole of a diaphragm of the valve. The filter device spans the entire span between an outlet pipe and a valve wall. Thus, all water entering the valve through the inlet passes through the filter prior to exiting through the outlet pipe, or prior to passing through the bleed hole in the diaphragm. The filter device can have a tubular or frusto-conical shape with a first, lower opening sealing about the outlet pipe, and a second, upper opening sealing against the valve wall.

Abstract: A filter head and a spin-on fuel filter element where the filter head includes an inlet and an outlet. A threaded nipple extends downwardly from a base of the filter head and includes a central flow passage. A valve member located in the flow passage is normally biased closed. The valve member includes a threaded portion extending outwardly from the nipple. The filter element includes upper and lower end caps, and is located in a housing having a tap plate. The tap plate includes a threaded central opening for screwing the filter element onto the filter head. The upper end cap supports a threaded sleeve which is screwed onto the valve member. The sleeve/valve member combination has a different thread pitch than the tap plate/nipple combination, which moves the valve member to an open position when the filter element is installed on the filter head.

Abstract: A filter assembly that filters water, particularly stormwater, that includes flow regulating, siphon inducing, and surface cleaning features that allow the filter assembly to operate at the design filtration rate for an extended period of time. During filtration, water flows inward through an annular filter medium into a drain manifold. The rate of flow into the drain manifold is controlled by a float valve assembly. A check valve permits air to escape, but not enter, the filter assembly creating a siphon effect when the rate of flow into the drain manifold is increased. The siphon effect draws water through the entire filtration surface and the entire volume of the filter medium. When the external water level decreases to the level of an array of voids in the filter assembly enclosure, the siphon is interrupted by turbulent air streams entering the filter assembly, agitating the filter surface and dislodging particulate matter.

Abstract: A multi-part filter combination is received in a stepped bore of a fluid-carrying component. A larger-diameter filter part is associated with a larger-diameter bore portion, and a smaller-diameter filter part is associated with a smaller-diameter bore portion. The two filter parts of the filter combination are connected by a connecting part. When the two filter parts are joined in their respective final position in the bore, this connecting part is detachable by means of a die to be introduced into the bore. The filter combination can be used in a valve block serving to receive a magnet valve.

Abstract: A sieve filter (1) for fluid lines or conduits which are formed of an annular disk-like fluid inlet (3) and an annular disk-like fluid outlet (4) with a fine mesh filter element arranged there between that is braced by stiffening bars (5), and which has a bypass function when the filter element (6) is stopped up or with highly viscous fluid. The fluid inlet (3) of the sieve filter (1) is constructed with the bypass function in that it has a smaller outside diameter than the fluid outlet (4) and is sealed off by a pressure relief valve (7). When the filter element (6) is stopped up or with highly viscous fluid in the line, the fluid inlet (3) is cleared by opening the pressure relief valve (7) as a bypass, through which the fluid is conducted unfiltered to the fluid outlet (4) of the sieve filter (1).

Abstract: A liquid filter, especially for oil of an internal combustion engine, with a bypass valve including a valve body 20 and a valve seat 21 integrated in an end plate 32 of the filter insert. A spring 22, which urges the bypass valve closed, is mounted in a support member 24 attached to the housing. Thus, parts of the bypass valve subject to wear and soiling can be replaced each time filter element 18 is replaced, and reliable operation of the bypass valve is assured throughout the life of the filter. The filter insert can be designed free of metal for easy disposability. The filter cartridge can also be used with known filter arrangements in which a permanent valve body is housed in the support member 24. When the filter element of the invention is used, this permanent valve body stays in the support member and functions as an intermediate piece 35, which transmits force between spring 22 and valve body 20. The valve function is assumed by new valve body 20 engaging valve seat 21.

Abstract: A fluid filter for a vehicle solenoid valve includes a male end piece, a female end piece, and a medial end piece therebetween. A first screen connects the male end piece to the central support piece and a second screen connects the female end piece to the central support piece. The female end piece is formed with a hole. A post extends from the male end piece. When the filter is wrapped around a solenoid valve, the hole engages the post and is heat staked to hold the filter snugly around the valve with the screens covering the valve ports.

Abstract: The invention relates to a filter device comprising at least one filter element (32), which can be accommodated inside a filter housing (22). Said filter device also comprises an inlet (16) for a fluid to be cleaned and an outlet (18) for the fluid cleaned by the filter element (32), whereby the filter element (32) is retained by at least one element retainer (106) of the filter housing (22). By virtue of the fact that a closing device (98) seals the interior (34) of the filter element (32) off from the environment when the filter element (32) is removed from the element retainer (106), a filter device is created which is improved with regard to the prior art and which, in particular, simplifies the necessary exchange of the filter element while imposing only a slight burden on the environment.

Abstract: The invention relates to a fuel filter for an internal combustion engine, comprising a filter housing (1) consisting especially of metal, and a filter element (6) and a pressure-regulating valve (7) located in said filter housing. The aim of the invention is to ensure that no noise originating from the pressure-regulating valve (7) is emitted. To this end, the pressure-regulating valve (7) is mounted in the filter housing (1) in such a way that vibrations are dampened.

Abstract: A sieve filter (1) for fluid lines or conduits which are formed of an annular disk-like fluid inlet (3) and an annular disk-like fluid outlet (4) with a fine mesh filter element arranged there between that is braced by stiffening bars (5), and which has a bypass function when the filter element (6) is stopped up or with highly viscous fluid. The fluid inlet (3) of the sieve filter (1) is constructed with the bypass function in that it has a smaller outside diameter than the fluid outlet (4) and is sealed off by a pressure relief valve (7). When the filter element (6) is stopped up or with highly viscous fluid in the line, the fluid inlet (3) is cleared by opening the pressure relief valve (7) as a bypass, through which the fluid is conducted unfiltered to the fluid outlet (4) of the sieve filter (1).

Abstract: A sieve filter for fluid lines, especially for hydraulic pressure lines (2) in internal combustion engines which is formed of a hollow cylindrical main body (3) with a fluid inlet (4) and a fluid outlet (5), and of a fine mesh filter element (6) for through flow by fluid which has a bypass function as well when the filter element (6) is stopped up or with highly viscous fluid. The sieve filter (1) is biased by a spring element (7), and is insertable together with the spring element (7), between two axially spaced opposing surfaces (8, 9) inside the pressure line (2) such that its fluid inlet (4) and the spring element (7) are prestressed against the opposing surfaces (8, 9), whereby the main body (3) of the sieve filter (1) closes a bypass fluid channel passing the filter element (6) which is clearable through an axial displacement of the main body (3) against the force of the spring element (7) resulting from the rise of fluid pressure on the filter element.

Abstract: In order for a filter element with a casing, having filter material, with an end wall which terminates the casing on an upper side and has a through-passage opening, and with a bypass valve for opening and closing the through-passage opening, the bypass valve having a valve housing which is made of plastics material and accommodates a valve body and a valve spring which loads the valve body in the direction of a valve seat, to be configured such that it can be assembled more easily and produced more cost-effectively, it is proposed that the valve housing comprises a valve guide, and that a separate supporting element is provided, it being possible, for assembly purposes, for the valve body and the valve spring to be introduced into the valve guide and then for the supporting element to be fixed on the valve guide.

Abstract: In a fluid filter with a housing and a filter element replaceably located in said housing, and with a filter by pads valve having a valve body held in the housing that is movable against the action of a spring from the closed position in which it cooperates with a sealing surface, into an open position in which it permits a fluid flow to bypass the filter element. The invention proposes that the sealing surface associated with the valve body be formed by the replaceable filter element.