Detent release for flow control valves

Claim 1

IN COMBINATION; A FLUID MOTOR AND A FLUID PRESSURE SUPPLY SOURCE THEREFOR; A CONTROL VALVE BETWEEN SAID SOURCE AND MOTOR HAVING A VALVE MEMBER THEREIN WHICH IS SPRINGBIASED TO AN INACTIVE POSITION BLOCKING FLUID COMMUNICATION BETWEEN SAID SOURCE AND MOTOR, AND WHICH IS MOVABLE TO AN ACTIVE POSITION PERMITTING FLOW OF FLUID FROM SAID SOURCE TO SAID MOTOR FOR ACTUATING THE LATTER; A DETENT MECHANISM IN SAID VALVE EFFECTIVE TO HOLD SAID VALVE MEMBER IN ACTIVE POSITION IN OPPOSITION TO SUCH SPRING-BIAS, SAID DETENT MECHANISM COMPRISING COMPLEMENTARY INTERENGAGED DETENT-RECESS MEANS AND A FLUID PRESSURE ACTUATED CAM FOR HOLDING SAID DETENT-RECESS MEANS IN INTERENGAGEMENT; AND A DETENT RELEASE RENDERED EFFECTIVE UPON PREDETERMINED ACTUATION OF SAID MOTOR, TO RELEASE SAID VALVE MEMBER FOR AUTOMATIC SPRING BIASED RETURN TO INACTIVE POSITION; SAID DETENT RELEASE COMPRISING A MOVABLE PLUNGER, A CONFINED BODY OF FLUID BETWEEN SAID PLUNGER AND CAM WHEREBY MOVEMENT OF SAID PLUNGER DEVELOPS FLUID PRESSURE IN SUCH BODY OF FLUID ACTUATES SAID CAM TO PERMIT DISENGAGEMENT OF SAID DETENT-RECESS MEANS AND CONSEQUENT SPRING BIASING OF SAID VALVE MEMBER TO INACTIVE POSITION, AND A CAM ACTUATED BY SAID MOTOR EFFECTIVE TO ENGAGE SAID MOVABLE PLUNGER UPON SUCH PREDETERMINED CATUATION OF SAID MOTOR.