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:
Jan. 10, 1989
Filed:
Aug. 20, 1985
Gary L Shoup, Greencastle, PA (US);
Allen B Coffman, Mercersberg, PA (US);
Robert L Fix, Hagerstown, MD (US);
Jerr-Dan Corportion, Greencastle, PA (US);
Abstract
A tow truck of the wheel-lift type is provided. In a first embodiment, a telescopic boom is supported by parallelogram linkage which is actuated by a hydraulic motor which is slightly inclined to the horizontal, the inner end of the boom, in its travel position being above and somewhat forwardly of the ring gear housing of the rear axle of the tow truck. The parallelogram linkage supports the boom through a boom support structure which permits it to be swung in a substantially horizontal plane, about substantially vertical pinions. The grid, which engages the wheels, includes a movable member which engages a wheel and raises it relative to the boom and grid, without movement of the boom. In a second embodiment, a substantially vertical post supports a parallelogram linkage which in turn supports a substantially horizontal extensible boom having a wheel grid at its outer end.