Patent ID: 6158780
Filing Date: 2000-12-12
Classification: B23Q

Abstract:
A coupling comprising a male half and a female half;said male half includes a cylinder closed at one end thereof, an outer piston residing partially within said cylinder, and an inner piston residing partially within said outer piston and moveable with respect to said outer piston; an upper gland and a lower gland; said upper and lower gland being affixed to said cylinder; said outer piston including an interior, an exterior, and a plug, said plug forming a closed end of said outer piston; said closed end of said cylinder and said closed end of said outer piston forming a piston chamber; said cylinder having a lower port and an upper port; said outer piston includes a first passageway for communicating between said lower port of said cylinder and said interior of said outer piston; said lower gland includes a port communicating with said piston chamber formed between said lower gland and said cylinder;and, said female half of said coupling adapted to receive said outer piston of said male half of said coupling.