| 摘要 |
<p>SELF-CENTERING TRAILER HITCH A self-centering trailer hitch includes a housing intended to be secured to either a tractor or trailer, with a guide tube laterally pivotally supported on the housing, an extensible and retractable tongue is telescoped into the tube, cooperable cam wedges and rollers on the housing and tongue urge the tongue and tube to a centered towing position as the tractor is backed toward the trailer, and detent means automatically lock the tube and the tongue in centered towing positions. The tongue may also be centered and locked for towing following connection of the hitch by moving the tractor ahead to align the tongue with the centerline of the vehicles and then backing the tractor toward the trailer until the detent locks the parts together.</p> |
