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US 10,655,753 B2Granted
Hydraulic valve
AssigneeClaverham Limited
InventorsJamie Philips, Reg Raval
Life of this patent
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Abstract
An electrohydraulic spool valve, comprising: a spool, axially movable within a manifold; a position feedback system provided at a first end of the spool; and an end cap provided on said first end so as to form a first high pressure reservoir between the end cap and the first end of the spool. The end cap provided on the end of the spool partly defines the high pressure reservoir by containing the high pressure fluid in the vicinity of the spool end.
Claims7
An electrohydraulic spool valve, comprising:
- a spool, axially movable within a manifold, wherein the spool comprises an axial conduit providing a fluid connection with a first end face of the spool and a radial conduit providing a fluid connection with said axial conduit;
- a position feedback system provided at the first end of the spool, wherein the position feedback system is in a lower pressure region which is fluidly connected to a system drain;
- and
- an end cap provided on said first end so as to form a mechanical seal around the spool and thereby separate the lower pressure region from a first higher pressure reservoir between the end cap and the first end of the spool,
- wherein the position feedback system comprises a first sensor part attached to the spool at a location between said radial conduit and said end cap, such that the axial conduit bypasses the first sensor part.
2 more elements
Dependencies are inferred from the claim text.