Agricultural Tractor Quick Disconnect Couplings-Present and Future

A new concept in connect-under-pressure hydraulic quick disconnect coupling for use on agricultural tractors. The coupling utilizes a 2-position spool-type body, within a housing, which opens and closes the fluid passage during the connect and disconnect functions. This concept permits connecting and disconnecting under all hydraulic pressure conditions up to relief pressure, and overcomes many limitations of existing couplings.