Abstract: A round filter element for filtering a fluid includes a filter medium body with a particle filter medium. The filter medium body surrounds a longitudinal axis and encloses an interior. An end body delimits the filter medium body at an end face of the filter medium body. The end body is an open end plate with a through opening in fluid communication with the interior. A sorption element is arranged in the through opening and connected directly or indirectly to the filter medium body or the end plate. The sorption element is flowed through by the fluid serially relative to the filter medium body in the direction of the longitudinal axis. The sorption element is sealed relative to the through opening. A filter system is provided with the filter element arranged in a filter housing between a fluid inlet and a fluid outlet.

Abstract: A filter element has first and second filter medium bodies, wherein one of the first and second filter medium bodies is arranged inside of the other one of the first and second filter medium bodies, and wherein the filter medium bodies are flowed through sequentially. An end plate is arranged at an end face of the filter element. At least the second filter medium body has a folded filter medium with end face edges at the end face. A side band seals the end face edges of the folded filter medium of the second filter medium body at the end face. The side band is embedded at least partially in the end plate. The filter element may be a cathode air filter of a fuel cell with an anode, a cathode, and electrolyte between the anode and the cathode, and the filter element configured to guide air to the cathode.

Abstract: A ring filter element for air filtration has a filter medium body enclosing an interior. An open end disc and a closed end disc delimit seal-tightly the filter medium body axially. The filter medium body has a folded bellows and an inner wall surface provided with a fold expansion. The open end disc has a cutout aligned with the fold expansion. A filter device has a filter housing with fluid inlet and fluid outlet. A ring filter element arrangement arranged in the filter housing separates fluid inlet from fluid outlet. The ring filter element arrangement has a ring filter element. A positioning device has an engagement element which extends radially outwardly and engages a counter engagement element of the ring filter element which is at least partially formed by the fold expansion at the inner wall surface of the filter medium body of the ring filter element.

Abstract: Filter apparatus (6) in particular passenger compartment filter apparatus, for example for a motor vehicle (1), comprising a filter element (8) having a filter medium body (9) and a frame (10) surrounding the filter medium body (9), wherein the frame (10) features opposite lateral surfaces (11, 12), a plurality of engagement elements (22a to 22d), and a filter housing (7) featuring, on two opposing wall sections (24, 25), in each case two engagement counter elements (28a to 28d) in which in each case one of the plurality of engagement elements (22a to 22d) can be accommodated in a positive fitting manner, wherein the engagement counter elements (28a to 28d) in each case are designed as a groove in the respective wall section (24, 25) of the filter housing (7) and feature: an insertion section (31) which, when the filter element (8) is mounted in the filter housing (7), permits an insertion movement of the respective engagement element (22a to 22d) substantially along the throughflow direction (L), and a locki

Abstract: A filter element for fluid has a filter medium body with a flow-through medium arranged transversely to a fluid flow direction. A region of the flow-through medium between an inlet surface and an outlet surface of the filter medium body is filled with adsorption medium in intermediate spaces of the flow-through medium. A fluid-permeable cover medium covers the region at a peripheral rim of the inlet surface and/or the outlet surface. A filter system has a filter housing having an inlet and an outlet for fluid. The filter element is exchangeably arranged in the filter housing between a raw-side and a clean-side. A method for producing the filter element includes filling adsorption medium into intermediate spaces of the flow-through medium between an inlet surface and an outlet surface. The region is covered with a fluid-permeable cover medium at a peripheral rim of the inlet surface and/or the outlet surface.

Abstract: A filter element for filtering a fluid has two or more axially extending filter medium bodies arranged to be sequentially flowed through radially and including a first and a second filter medium body. The first filter medium body has an outer diameter smaller than an inner diameter of the second filter medium body, is arranged radially inside the second filter medium body, and has a section projecting axially away from the second filter medium body. A casing is arranged at an outer wall surface of the projecting section and extends at least partially circumferentially around the outer wall surface. The casing fluid-impermeably closes at least temporarily the outer wall surface. The first filter medium body is a particle filter and the second filter medium body is an adsorption filter, or vice versa. A filter system is provided with such a filter element for filtering a fluid.

Abstract: A gas filter system has an outer filter element with a first end plate, a second end plate, and a first filter medium arranged between the first and the second end plates. An inner filter element with a third end plate, a fourth end plate, and a second filter medium arranged between the third and the fourth end plates is provided. The first end plate and the third end plate each have an opening. The first end plate surrounds the third end plate. The first end plate has a first seal protrusion protruding in an axial direction of the gas filter system. The third end plate has a second seal protrusion protruding in the axial direction of the gas filter system. For sealing the third end plate and the first end plate relative to each other, the first seal protrusion and the second seal protrusion engage each other.

Abstract: A gas filter system including a housing, a first filter element having a first filter medium and a second filter element having a second filter medium, the first and second filter elements being arranged inside the housing and the first filter medium and the second filter medium surrounding a common longitudinal axis, wherein a flexible sealing lip protrudes in the axial direction from the first filter medium, wherein the housing has a first sealing surface for sealing abutment against the sealing lip, wherein a rigid sealing rib protrudes from the second filter element, the sealing rib having a second sealing surface for sealing abutment against the sealing lip, wherein the sealing lip is compressed between the first sealing surface and the second sealing surface, and wherein the second sealing surface faces radially outwardly.

Abstract: A filter element has a filter medium body surrounded by a frame with two engagement elements arranged at a side face of the frame and extending away from the filter medium body that engage in a locked state with correlated engagement element counterparts at a filter housing. A rigid element connects the engagement elements to the side face. The engagement elements disengage the correlated engagement element counterparts in a released state and have a first distance to each other in the released state and a second distance to each other in the locked state that differs from the first distance. The engagement elements are connected by an elastic element to the rigid element. The elastic element, when the engagement elements transition from the locked into the released state, generates a restoring force acting on the engagement element.

Abstract: A gas filter system comprising an outer filter element having a first filter medium arranged between a first end cap and a second end cap, and an inner filter element having a second filter medium arranged between a third end cap and a fourth end cap, the first filter medium being arrangeable to surround the inner filter medium, wherein the first, second, third and fourth end caps are open.

Abstract: A gas filter system including an outer filter element having a first filter medium arranged between a first end cap and a second end cap, and an inner filter element having a second filter medium arranged between a third end cap and a fourth end cap, wherein the first filter medium is arrangeable to surround the second filter medium, wherein the first, third and fourth end caps are open, wherein the outer filter element is closed at the second end cap, wherein the outer filter element has an axial protrusion at the second end cap that protrudes into the inner filter element and exhibits a radially outward facing sealing surface, and wherein the fourth end cap of the inner filter element has a second sealing section for sealing abutment against the sealing surface of the protrusion.

Abstract: A gas filter system including a housing with a sealing projection and a housing groove; an outer filter element having a first filter medium with a first end cap and a second end cap; and an inner filter element having a second filter medium with a third end cap and a fourth end cap, wherein the first end cap has a first axial end cap projection and the third end cap has a second axial end cap projection, the end cap projections being arranged in the housing groove; the first and second end cap projections forming a common groove into which the sealing projection protrudes for sealing abutment against the first end cap and the third end cap at the common groove. The use of an outer filter element and/or an inner filter element in the gas filter system.

Abstract: A gas filter system including an outer filter element having a first filter medium arranged between a first end cap and a second end cap, and an inner filter element having a second filter medium arranged between a third end cap and a fourth end cap, wherein the first, second and third end caps are open, the inner filter element is closed at the fourth end cap, the first filter medium is arrangeable to surround the second filter medium, such that the first end cap of the outer filter element surrounds the third end cap of the inner filter element, the first and third end caps are sealed against each other, and such that the second end cap of the outer filter element surrounds the fourth end cap of the inner filter element, and the second and fourth end caps are sealed against each other.

Abstract: A gas filter system including an outer filter element having a first filter medium arranged between a first end cap and a second end cap, and an inner filter element having a second filter medium arranged between a third end cap and a fourth end cap, wherein the first, third and fourth end caps are open, wherein the outer filter element is closed at the second end cap, wherein the first filter medium is arrangeable to surround the second filter medium, such that the outer filter element is sealed against the inner filter element between the second end cap and the fourth end cap.

Abstract: An air filter comprises a filter housing, a blower arranged in the filter housing and serving to generate an air flow from an air inlet to an air outlet, a filter unit arranged in an operating position between the air inlet and the air outlet in the filter housing, the filter unit having: a) a plurality of filter elements, of which an outer filter element and a filter element adjacent thereto are arranged at an angle to one another and are connected to one another at a joint edge, and b) a first side holder and a second side holder which serve to fix the filter elements. A first flap of a flexible material is fixed to an outer end of the outer filter element and extends parallel to the joint edge, the first flap not being fixed over an entire width and having an unattached, free overhang.

Abstract: An interior room air filter module has a particle filter element, an adsorption filter element, and a frame with a radially protruding seal flange surrounding them. The particle filter element has a folded pack with zigzag-folded layers of filter medium. The layers include a layer with an aerosol-separating filter medium, an inflow-side first layer, and an outflow-side second layer at the particle filter element. The first and second layers, for forming the folded pack, are folded while resting on each other. The adsorption filter element has shaped bodies in the form of honeycomb bodies which adsorb at least hydrocarbons. The seal flange laterally surrounds the adsorption filter element at a circumferential exterior wall thereof. A filter assembly has a filter housing for receiving such an air filter module and has first and second seal sections following a contour of the seal flange or seal attached thereto.

Abstract: A filter device has a filter element with filter medium body and surrounding frame with opposed lateral faces. A filter housing has opposed wall sections with two engagement counter elements for form fit engagement of an engagement element, respectively. The engagement counter elements are grooves in the wall sections with an insertion section and a blocking section connected to the insertion section and angled thereto. The insertion section permits insertion of the engagement element along a flow direction through the filter element. When mounted, the engagement element is arranged at one of the lateral frame faces, extends away from the filter medium body, and is held in the blocking section. Hold sections are connected to the engagement elements and, when mounted, at least partially engage the filter element. A vehicle with such a filter device and a method for mounting the filter element with engagement elements are provided.

Abstract: A filter device has a filter element with filter medium body and surrounding frame with opposed lateral faces. A filter housing has opposed wall sections with two engagement counter elements for receiving with form fit an engagement element, respectively. The engagement counter elements are grooves in the wall sections with an insertion section and a blocking section connected to the insertion section and angled thereto. The insertion section permits insertion of the engagement element along a flow direction through the filter element. In the mounted state, the engagement element is arranged at one of the lateral faces of the frame, extends away from the filter medium body, and is held in the blocking section. One or several of the engagement elements are separate parts fastenable detachably to the filter element. A vehicle with such a filter device and a method for mounting the filter element with engagement elements are provided.

Abstract: A filter device has a filter element with filter medium body and surrounding frame with opposed lateral faces. A filter housing has opposed wall sections with two engagement counter elements for form fit engagement of an engagement element, respectively. The engagement counter elements are grooves in the wall sections with an insertion section and a blocking section connected to the insertion section and angled thereto. The insertion section permits insertion of the engagement element along a flow direction through the filter element. When mounted, the engagement element is arranged at one of the lateral frame faces, extends away from the filter medium body, and is held in the blocking section. Two of the engagement elements are connected by a connection piece. A vehicle with such a filter device, a set of filter element and engagement elements, and a method for mounting the filter element with engagement elements are provided.

Abstract: A filter element has a fold pack with a filter material folded in a zigzag shape. The fold pack has lateral fold profiles and an end fold section disposed at a head side of the fold pack. Lateral strips are attached to the lateral fold profiles of the fold pack. A seal section angularly projects at an angle away from the end fold section at the head side of the fold pack. The seal section is provided with at least one incision or cutout configured to receive a corresponding filter housing contour. A filter assembly with such a filter element is provided. The filter housing has a housing part with a filter housing contour provided with at least one engagement element. The at least one incision or cutout of the seal section receives the at least one engagement element of the filter housing contour.