| 摘要 |
<p>A coupling assembly for coupling a tractor to a drawn vehicle or implement comprises a coupling body for attachment to one of a tractor drawbar or trailer tongue, and for engagement with a ball secured to the other of said tractor drawbar or trailer tongue, the body defining ramp means for guiding a ball into a socket forming part of the body, a movable element for locking a ball in said socket, movable second ramp means for guiding a ball out of the socket, and means for operating the movable element and second ramp means between a locking position in which the ball is held in the socket and a release position in which the ball is free to move out of the socket up the second ramp means.</p> |
