The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 20, 1983
Filed:
Jul. 30, 1981
David C Mitchell, 1255 Veyrier, Geneva, CH;
Other;
Abstract
The coupling is provided with a load bearing plate (6) tiltably mounted on a circular plate (10) supported on the tractor for rotation about a substantially vertical axis (20). The load bearing plate receives, in a slot (7) formed therein, a pair of spaced apart kingpins (1,3) on the underside of the trailer (A) in such manner that the trailer and the two plates are restrained from rotation with respect to each other. A pair of fluid operated rams (29,30) are mounted on the tractor and are arranged to cooperate an opposite sides of said axis (20) with rollers (35,36) carried by the circular plate via a pair of swinging arms (23,24) pivoted on a center shaft at one end and on the ends of the ram piston rods (27,28) near their opposite end. Thus only one ram at a time may become operable to resist rotation of the plates away from an in-line position of the tractor and trailer or to restore this position, to avoid trailer swing or to cure a jacknifing condition, without the piston rods fouling the center shaft.