Hydraulic control valve assemblies

A fluid control valve assembly comprising a housing provided with a bore, an inlet port, an outlet port for communication with said inlet port, and an exhaust port for communication with said outlet port, a piston axially movable in said bore and movable between an inoperative retracted position and an operative advanced position, an inlet valve for controlling communication between said inlet port and said outlet port, said inlet valve being closed when said piston is in said inoperative retracted position and open when said piston is in said operative advanced position, an exhaust valve for controlling communication between said outlet port and said exhaust port, said exhaust valve being open when said piston is in said inoperative retracted position and closed when said piston is in said operative advanced position, a valve-operating assembly common to both valves and adapted to effect simultaneous operation of said valves in response to movement of said piston in said bore, and a reversing mechanism incorporated in said valve-operating assembly to effect positive movement of one of said valves in a direction opposite to that in which said piston is being moved axially, wherein spaced inlet and exhaust seatings surround said inlet and exhaust ports, and said valve operating assembly comprises oppositely arranged inlet and outlet valve members for engagement with said inlet and exhaust seatings, a cup-shaped sleeve having a skirt, an end wall closing one end of said skirt, an enlarged head on one of said valve members slidably received within said sleeve, a block of resilient meterial interposed between said enlarged head and said seating with which said one valve member is adapted to engage, and an engagement between the free end of said skirt remote from said end wall and an annulus in the region of the peripheral edge of said block so that a portion of said block inwardly of said annulus is expanded when a compressive force is applied to said annulus by said skirt in response to a force applied to said end wall, whereby the said one valve member is moved away from the said one seating.