Fluid operated timing apparatus

Claim 1

A MERCHANICAL ACTION TIMING APPARATUS COMPRISING IN COMBINATION (1) AN ACCUMULATOR VESSEL; (2) A TIMING BODY HAVING A FORWARD END AND A REAR END AND HAVING DISPOSED THEREIN FOR RECIPROCATING MOTION A TIMING PISTON HAVING A REAR FACE AND A FORWARD FACE WHICH PISTON DIVIDES THE TIMING BODY INTO AT LEAST FOUR FLUID TIGHT COMPARTMENTS AS FOLLOWS: (A) A FIRST TIMING COMPARTMENT HAVING THE FORWARD FACE OF THE PISTON AS ONE SIDE THEREOF AND THE FORWARD END OF THE TIMING BODY AS THE OPPOSITE SIDE THEREOF AND BEING IN FLUID COMMUNICATION THROUGH A TIMING PORT WITH THE ACCUMULATOR VESSEL, (B) A SECOND TIMING COMPARTMENT IN FLUID COMMUNICATION THROUGH A FORWARD DISCHARGE VENT WITH A REGION OF RELATIVELY LOW PRESSURE. (C) A THIRD TIMING COMPARTMENT CAPABLE OF BEING PLACED IN FLUID COMMUNICATION WITH A RELATIVELY HIGH PRESSURE SOURE THROUGH A PRESSURE PORT, AND (D) A FOURTH TIMING COMPARTMENT HAVING THE REAR END OF THE TIMING PISTON AS ONE SIDE THEREOF, AND THE REAR END OF THE TIMING BODY AS THE OPPOSITE SIDE THEREOF AND HAVING DISPOSED THEREIN A RESILIENT MEANS TO RETURN THE TIMING PISTON TO A FORWARD POSITION; (3) AN ACTUATOR BODY HAVING A FORWARD END AND A REAR END AND HAVING DISPOSED THEREIN FOR RECIPROCATING MOTION AN ACTUATOR PISTON HAVING A REAR FACE AND A FORWARD FACE AND HAVING AN ACTUATOR PISTON ROD INTEGRALLY MOUNTED WITH SAID PISTON FOR MOVEMENT THEREWITH, SAID ROD PROJECTING IN A FLUID TIGHT MANNER EXTERNALLY OF THE TIMING BODY, WHICH PISTON DIVIDES THE ACTUATOR BODY INTO AT LEAST FOUR FLUID TIGHT COMPARTMENTS AS FOLLOWS: