Pneumatic reciprocating valve

Claim 1

A PNEUMATICALLY ACTUATED RECIPROCATING VALVE FOR ALTERNATELY SUPPLYING PRESSURE FLUID TO OPPOSITE ENDS OF A POWER CYLINDER OR THE LIKE, COMPRISING A VALVE BODY HAVING A BORE THEREIN, AN INLET PORT AND A PAIR OF WORK PORTS COMMUNICATING WITH SAID BORE, A VALVE SPOOL RECIPROCABLE IN SAID BORE AND OPERABLE UPON RECIPROCATION THEREOF ALTERNATELY TO CONNECT EACH WORK PORT WITH SAID INLET PORT AND THE OTHER WORK PORT TO EXHAUST, MEANS CONNECTING SAID WORK PORTS TO OPPOSITE ENDS OF THE POWER CYLINDER, PASSAGE MEANS CONNECTING SAID INLET PORT TO OPPOSITE ENDS OF SAID BORE TO SUPPLY PRESSURE FLUID TO OPPOSITE ENDS OF SAID VALVE SPOOL, EACH SAID PASSAGE MEANS INCLUDING A RESTRICTED ORIFICE THEREIN, AN EXHAUST PASSAGE COMMUNICATING WITH EACH END OF SAID BORE AND A NORMALLY CLOSED POPPET VALVE IN EACH SAID EXHAUST PASSAGE, PRESSURE RESPONSIVE MEANS ASSOCIATED WITH EACH OF SAID POPPET VALVES AND MEANS CONNECTING EACH WORK PORT WITH ONE OF SAID PRESSURE RESPONSIVE MEANS FOR ACTUATING THE LATTER, SAID PRESSURE RESPONSIVE MEANS BEING OPERABLE UPON ACTUATION THEREOF TO OPEN THE POPPET VALVE ASSOCIATED THEREWITH AND EXHAUST ONE END OF SAID BORE THEREBY TO PERMIT THE PRESSURE FLUID IN THE OPPOSITE END OF SAID BORE TO SHIFT SAID SPOOL TOWARD SAID ONE END OF SAID BORE, SAID PRESSURE RESPONSIVE MEANS BEING OPERABLE TO OPEN THEIR RESPECTIVE POPPET VALVES ONLY UPON COMPLETION OF A WORK STROKE BY THE POWER CYLINDER.