Two-way hydraulic valve with one way time delay

A two-way hydraulic valve adapted to be installed in a conduit through which fluid can flow in a forward direction and a reverse direction comprising:

• a valve body having opposite front and rear ends each provided with a conduit connector;
• forward and reverse flow passage means extending between said opposite ends for permitting fluid flow through said valve body from said front to rear ends and from said rear to front ends in said forward and reverse directions respectively;
• check valve means in said reverse flow passage means for preventing fluid flow therethrough in said forward direction;
• spool means moveable in said valve body between a closed forward flow position and an open forward flow position for controlling fluid flow through said forward flow passage means, spool biasing means for normally urging said spool means to said closed forward flow position, said spool means being moveable to said open forward flow position in response to fluid pressure acting in said forward direction against said spool means;
• and
• hydraulic damping means for restricting the rate of movement of said spool means to said open forward flow position whereby the opening of said forward flow passage means is delayed when fluid pressure is applied to said valve in said forward direction.