Invention Grant
US08127790B2 Hydraulic valve with a filter and check valve band 有权
带过滤器和止回阀带的液压阀

Hydraulic valve with a filter and check valve band
Abstract:
An hydraulic valve has a body with an exterior surface, a longitudinal bore, and first and second fluid ports in communication with the bore wherein the first fluid port opens through the exterior surface. A band is wrapped in first and second layers around the exterior surface which layers extend over the opening of the first fluid port. The first layer has a plurality of apertures there through and overlaying the opening to provide a filter. The second layer has a flap that flexes in response to pressure to open and close the plurality of apertures thereby acting as a check valve. An actuator slides a spool within the bore thereby selectively connecting and disconnecting the first and second fluid ports.
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