Filter element especially for filtering liquids or gases
AssigneeMann+Hummel GmbH
InventorsFrank Pflueger, Dieter Schreckenberger
Life of this patent
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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.
Claims17
A filter element for filtering a liquid or a gas, said filter element comprising
- a concentrically arranged filter medium folded in zigzag pleats and being provided with end disks at the axial end faces of the filter medium,
- each end disk having an inner side that is secured to the filter medium and an outer side that faces away from the filter element;
- wherein at least a first end disk carries a valve element which is arranged concentrically inside the filter medium,
- said valve element comprising
- a valve seat formed in the first end disk;
- and
- a valve body mounted on the first end disk in an axially movable manner inside and surrounded by the filter medium, said valve body including
- a valve body sealing member having a sealing surface which closes against the valve seat;
- an axially extending circumferentially continuous closed cylindrical or conical valve body surface without gaps or grooves, said valve body surface having a first end secured to an inner side of said valve body sealing member and extending inwardly away from said valve body sealing member into an interior of said filter element;
- a plurality of V-shaped members secured to said inner side of said first end disk and spaced apart radially around an exterior of said axially extending circumferentially closed valve body surface, said V-shaped members including
- a radially inwardly arranged leg forming resilient guide webs, each guide web contacting said circumferentially closed valve body surface, guiding axial movement of said valve body in said first in disk;
- a radially outwardly arranged leg forming contact pins extending axially into an interior of said filter element and toward the other end disk of said filter element, said contact pins configured to interact with a filter support tube of a housing into which said filter element installs.
A filter element for filtering a liquid or a gas, the filter element removably insertable into a filter housing, the filter element comprising:
- a concentrically arranged filter medium having an open interior extending along a central axis, the filter medium folded in zigzag pleats and being provided with end disks at axial end faces of the filter medium,
- each end disk having an axial inner side that is secured onto the filter medium and an axial outer side that faces away from the filter element;
- wherein a first one of the end disks forms a valve seat smoothly curved outwards across a plane of the axial outer side of the first end disk;
- a valve opening centrally located in the curved valve seat portion of the first end disk and extending axially through the first end disk into the open interior;
- a valve body secured directly to the first end disk and axially movable in the first end disk, the valve body axially moveable to close against the valve seat;
- wherein the valve body is has an axially extending circumferentially continuous closed cylindrical or conical valve body surface without gaps or grooves in the valve body surface;
- wherein the valve body includes
- a valve body sealing member having a sealing surface which sealably closes against the valve seat;
- and
- wherein the valve body has a first end secured to an inner side of the valve body sealing member and extending axially inwardly away from the valve body sealing member into the open interior of the filter element;
- a plurality of V-shaped members secured to said inner side of said first end disk and spaced apart radially around an exterior of said axially extending circumferentially closed valve body surface, said V-shaped members having a radially inwardly arranged leg forming a resilient guide web contacting said circumferentially closed valve body surface, guiding axial movement of said valve body in said first end disk;
- a radially outwardly arranged leg forming contact pins extending axially into an interior of said filter element and toward the other end disk of said filter element, said contact pins configured to interact with a filter support tube of a housing into which said filter element installs;
- wherein the valve sealing member is arranged axially outwardly above the plane of the axial outer side of the first end disk;
- wherein the valve seat is arranged axially outwardly above the plane of the axial outer side of the first end disk.
Dependencies are inferred from the claim text.