Importance

Loading Importance Indicators...

Abstract

A handle mechanism for a trailer coupling of the type having a coupling member that is rotatably mounted in a body and is movable between an open position, where a draw bar eye can be placed on or removed from the coupling member, and a closed position where it cannot, a latch that prevents rotation of a coupling member without first rotating the latch and a lug that prevents rotation of the latch unless the shaft that carries the latch is moved sideways in the body against a spring. An annular ring rotatably mounted on an end of the shaft that extends out of the body acts as a cam element that bears against the body when it is rotated, to move the shaft longitudinally in the body and thus move the latch away from the lug that prevents its rotation. An L-shaped handle attached to the ring provides a mechanical advantage in the rotation of the ring and facilitates rotation of the shaft after it has been pulled sideways. The cam action of the ring and the mechanical advantage imparted to it by the handle allow the shaft to be moved, even when a load is transmitted to the latch through the coupling element which prevents it from being easily moved.

Loading the Abstract Image...

First Claim