Hydraulic valve
AssigneeClaverham Limited
InventorsPaul Brewer, Reg Raval
Life of this patent
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Abstract
A hydraulic spool valve assembly comprising a housing defining a bore having a longitudinal axis (L), a hydraulic spool valve, a sleeve disposed within the bore and a temperature compensation device disposed between the sleeve and the housing. The hydraulic spool valve having a first end for connection to a drive arm, and an opposing second end disposed within the bore. The sleeve disposed between the hydraulic spool valve and the housing. The temperature compensation device configured to expand in a first longitudinal direction in response to a temperature increase, to oppose movement of the sleeve in an opposing second longitudinal direction caused by the temperature increase.
Claims10
A hydraulic spool valve assembly, comprising:
- a housing defining a bore having a longitudinal axis (L);
- a hydraulic spool valve having a first end for connection to a drive arm, and an opposing second end disposed within the bore;
- a sleeve disposed within the bore between the hydraulic spool valve and the housing;
- and
- a temperature compensation device in operative connection with the sleeve and the housing, the temperature compensation device configured to expand in a first longitudinal direction in response to a temperature increase, to oppose movement of the sleeve in an opposing second longitudinal direction, wherein the temperature compensation device includes a shape memory alloy or a bimetallic device.
Dependencies are inferred from the claim text.