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:
Nov. 30, 1976
Filed:
Jun. 23, 1975
Clarence Kirk Greene, Reno, NV (US);
Other;
Abstract
A vehicle, such as a single truck or a truck-and-trailer combination, having a power plant, has primary ground-engaging wheels driven by the power plant and a hydraulic pump, also driven by the plant and connected by ducts to a variable-displacement motor which is mechanically coupled to drive secondary driving wheels, e.g., tandem wheels on the truck or wheels on a trailer, there being first and second ducts between the pump and motor, and the displacement of the motor can be altered to equalize substantially the pressures within the two ducts when the vehicle moves ahead on straight road affording good traction. Substantially no power is transmitted through the ducts while the vehicle moves on said road, but when one of, e.g., the primary driving wheels slips, either forwardly or backwards, hydraulic fluid is transmitted through the ducts to retard or speed-up the primary driving wheel through the pump.