Power-assisted coupling

Claim 1

A manually operated power-assisted fluid coupling for interconnecting fluid systems comprising, in combination, a female part having an axial passage having an inner end connectable to a first pressurized fluid system and an open outer end, a first self-sealing valve within said passage at said outer end, a male part having an axial passage having an inner end connectable to a second fluid system and an outer end adapted to be sealingly received within said female part outer end and having an end pressure face, a second self-sealing valve within said male part passage at said outer end thereof, a tubular sleeve concentrically mounted within said female part about its passage for axial displacement in a release position to a release position and in a couple direction to a fully coupled position, said sleeve having an open end adjacent said female part outer end and sealingly receiving said male part outer end, releasable lock means defined on said sleeve adjacent its open end, lock receiving means defined upon said male part outer end receiving said lock means, a lock actuator defined on said female part selectively engaging said lock means with said lock receiving means and releasing said lock means from said lock receiving means when said sleeve is in said release position, first and second expansible chamber motors defined on said female part operatively connected to said sleeve, a first fluid circuit connecting said first motor to said first pressurized fluid system, a second fluid circuit selectively connecting said second motor to said first pressurized fluid system and exhausting said second motor, a manual actuator mounted upon said female part movable between first and second positions and in couple and release directions, a valve movably mounted on said female part operatively connected to said manual actuator and controlling fluid flow through said second fluid circuit, said valve being engagable with said sleeve upon said manual actuator moving in said release direction, said first and second manual motors having substantially equal pressure faces of larger area than that of said male part end pressure face, said first motor biasing said sleeve in said couple direction, said second motor biasing said sleeve toward said release position, said first position of said manual actuator exhausting said second motor permitting said first motor to displace said sleeve in said couple direction to said fully coupled position drawing said male part into said female part passage causing said first and second self-sealing valves to engage and open to establish communication between said passages of said female and male parts, said second position of said manual actuator pressuring said second motor by said second fluid circuit to substantially balance the effect of said motors upon said sleeve, movement of said manual actuator in said release direction engaging said valve with said sleeve to displace said sleeve to said release position.