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:
Oct. 02, 1990
Filed:
Sep. 22, 1989
Rudi Reppert, Fussen, DE;
Franz-Xaver Zaunberger, Augsburg, DE;
Renk Aktiengesellschaft, Augsburg, DE;
Abstract
A superposition steering system for a track vehicle includes an infinitely variable steering drive unit integrated with an engine driven mechanical steering input drive to provide a reduction in the amount of power to be transmitted by the variable steering drive to only 20% of the total steering power. The system includes a steering transmission having five epicyclic differential gears and five shift couplings with the differential gears and shift couplings so connected that for shifting from one operating speed to another, in each instance, only one shift coupling is required to be opened and another shift coupling required to be closed. Because of the small number of shift couplings, operating reliability is increased and shifting between various stages can take place quickly to provide high vehicle maneuverability.