Patent ID: 6739614
Filing Date: 2004-05-25
Classification: B60D

Abstract:
Trailer hitch for heavy vehicles comprising:(a) a coupling housing arranged on a traction vehicle comprising a rear, vertical end piece from which extends an upper, forward protruding coupling yoke piece and a lower, forward protruding coupling yoke piece, between which a tow eye on a trailer and a tow ball arranged in the tow eye are intended to be secured with a coupling pin running through a hole in the tow ball; (b) a principally vertical wedge arranged between the coupling yoke pieces in front of the rear end piece so that wedging action increases as the wedge is pressed down; (c) an intermediate piece equipped partly with an upper, forward protruding part and partly with a lower, forward protruding part, arranged between the wedge and the tow ball, whereby the parts are intended to abut against an upper and a lower part of the tow ball; and (d) a spring device acting on the wedge and intending to press down the wedge.