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:
Jul. 19, 1994
Filed:
Jun. 03, 1991
Applicant:
Inventor:
George M Ketcham, Easton, CT (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B62D / ;
U.S. Cl.
CPC ...
180 142 ; 180 146 ;
Abstract
A wheeled tailer power unit includes a self-powered, self-contained towing servomechanism that permits selective towing and control of a trailing vehicle by a leading vehicle in the absence of a power transmitting and control umbilical between the leading vehicle and the trailer power unit, A controller included in the trailer power unit measures the relative displacement of the unit and the leading vehicle and communicates to a unit control and drive means appropriate signals to operate variable torque transmitting drive means operating the respective wheels of the trailer power unit.