초록

A proportional solenoid operated pressure regulating valve is disclosed. First and second metering spools are respectively mounted for movement inside first and second control spools. Each metering spool responds to a fluid pressure being controlled at a respective operating port.

대표청구항 ▼

A pressure regulating valve comprising: a valve housing having a longitudinal bore defined by an inner bore surface; first and second control spools reciprocally mounted with outer ends and opposing spaced inner ends for movement in said housing bore between a rest position and an operating position

A pressure regulating valve comprising: a valve housing having a longitudinal bore defined by an inner bore surface; first and second control spools reciprocally mounted with outer ends and opposing spaced inner ends for movement in said housing bore between a rest position and an operating position, each spool defining with said inner bore surface an operating chamber adapted to be connected to a pressure fluid source in said operating position and disconnected in said rest position and each adapted to be connected to a respective load so fluid flows to said load in said operating position, each spool having a spool bore in communication with said operating chamber and defining a pressure metering area smaller than the cross-sectional area of the control spool; first and second metering spools respectively mounted for movement in said spool bores and extending into the space between said control spools to abut, each said metering spool responding to pressure in the respective operating chamber to apply a force to both control spools; and first and second actuating means for applying a force respectively to the outer end of said control spools to cause said spools to move to said operating position, the forces produced by said metering spools opposing the force applied by said actuating means.