A drawbar for a trailer hitch receiver tube has a translation screw passing from the back end to the front end of the drawbar in a longitudinal unthreaded passage in the drawbar. A ramp nut is threaded onto the translation screw and is retained in a ramp nut chamber in the front end of the drawbar. A captive ball is retained in a captive ball retention chamber passing between the ramp nut chamber and the exterior of the drawbar. A ramp on the ramp nut pushes the ball to extend beyond the exterior of the drawbar when the translation screw is turned to pull the ramp nut backward in the ramp nut chamber. This eliminates all play between the drawbar and the receiver tube in which the drawbar is inserted. A spring between the ramp nut and the drawbar may urge the ramp nut forward.
TRAILER HITCH DRAWBAR TIGHTENING MECHANISM
2018-10-18
Patent
Electronic Resource
English
IPC: | B60D Fahrzeugverbindungen , VEHICLE CONNECTIONS / F16B DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES , Vorrichtungen zum Befestigen oder Sichern von Konstruktionselementen oder Maschinenteilen, z.B. Nägel, Bolzen, Schrauben, Sprengringe, Klemmen, Klammern oder Keile |
Tightening mechanism for trailer drawbar hinge assembly and method of using same
European Patent Office | 2015
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