Patent ID: 7036850

Claim:
A coupling for attachment to the end portion of a pipe, comprising: a coupling body to closely receive the end portion of the pipe to be coupled therewith; a set of first class lever jaw members each having a power arm and a separate weight arm extending from an axle which forms a fulcrum, said axle having a fulcrum mounting portion extending away from the arms; and a mounting hole in the coupling body rotatably receiving the fulcrum mounting portion of each set of lever jaw members therein as the sole mounting of the set of lever jaw members to the coupling body to establish the fulcrum for rotation of each lever jaw member about the fulcrum where rotation of the power arm about the fulcrum causes rotation of the weight arm about the fulcrum to an engaged position or to a disengaged position with respect to the end portion of the pipe when the pipe is received in the coupling body.