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US 3,937,250 AGranted
Pressure relief adjustment means for check valve
AssigneeCaterpillar Tractor Co.
InventorsKenneth F. Golan, Larry W. Oetzel
Life of this patent
Estimating the term…
Abstract
A check valve comprises a spring biased poppet reciprocally mounted in a housing thereof to normally close an inlet to the valve. A set screw is threadably mounted in an exposed position on the housing to selectively vary the spring load on the poppet to thus vary the pressure setting thereof. An annular elastomeric locking member circumvents the set screw and is compressed radially inwardly thereagainst by a clamping member, releasably attached on the housing, to retain the set screw in its preset position.
Claims25
A valve defining an inlet and an outlet therein comprising
- a housing,
- a valve element mounted for axial movement in said housing,
- spring means mounted in said housing to urge said valve element into closing relationship with respect to said inlet,
- externally threaded adjustment means threadably mounted for axial movement in said housing to selectively vary the load on said spring means to thus vary the pressure of said valve element,
- a clamping member releasably clamped on said housing and having an access opening formed therethrough to overlie and expose said adjustment means, and
- an annular deformable elastomeric locking means compressed axially and radially inwardly under a pre-set clamping force by said clamping member and circumferentially into the external threads of said adjustment means for locking said adjustment means in a predetermined axial position whereby axial adjustment of said adjustment means may be effected by projecting a work tool through said access opening to engage and rotate said adjustment means.
3 more elements
A device comprising
- an adjusted member,
- adjustment means mounted for axial movement relative to a support member for selectively moving said adjusted member axially to an adjusted position,
- a clamping member releasably attached on said support member and having an access opening formed therethrough to overlie and expose said adjustment means and
- an annular deformable elastomeric locking means compressed axially and radially inwardly under a pre-set clamping force by said clamping means circumferentially into frictional engagement with said adjustment means for locking said adjustment means in a predetermined axial position whereby axial adjustment of said adjustment means may be effected by projecting a work tool through said access opening to engage and rotate said adjustment means.
1 more element
Dependencies are inferred from the claim text.