Back to results
US 5,770,054 AGranted
Fluid filter with filter bypass valve and sealing surface on filter element side
AssigneeFirma Ing. Walter Hengst GmbH & Co. KG
InventorWilhelm Ardes
Life of this patent
Estimating the term…
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.
Claims23
A fluid filter, comprising
- a housing,
- a replaceable filter element positioned within said housing, said filter element including first and second ends and a filtering surface positioned therebetween, and
- a filter bypass valve including a valve body, mounting means for integrally mounting said valve body within said housing so as to remain mounted within said housing when the replaceable filter is replaced, said valve body being movable between a closed position, in which said valve body sealingly engages a sealing surface, and an open position in which said valve body permits fluid flow to bypass said filter element,
- wherein said first end of said filter element forms said sealing surface for said valve body.
1 more element
A fluid filter for an engine, comprising
- a carrier engagable with the engine,
- a removable lid matable with said carrier,
- a support dome attached to said carrier and extending along a longitudinal axis,
- a replaceable filter element positioned around said support dome, said filter element including first and second ends and a filtering surface positioned therebetween, and
- a filter bypass valve including a valve body, mounting means for integrally mounting said valve body within said support dome such that said valve body remains mounted within the support dome when the replaceable filter element is replaced and movable between a closed position, in which said valve body sealingly engages a sealing surface, and an open position in which said valve body permits fluid flow to bypass said filter element, said valve body being positioned within said support dome for movement along the longitudinal axis of said support dome between said closed position and said open position,
- wherein said first end of said filter element is separable from said lid and forms said sealing surface for said valve body, and whereby removal of said lid from said carrier permits said filter element and thus said sealing surface to be removed from the carrier and support dome attached thereto.
3 more elements
Dependencies are inferred from the claim text.