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:
Dec. 20, 1983
Filed:
Mar. 26, 1981
Michael Meyerle, Meckenbeuren, DE;
Zahnradfabrik Friedrichshafen, AG, Friedrichshafen, DE;
Abstract
A drive system for a track-laying vehicle has a main drive shaft connectable to an engine and to primary inputs of right and left summing transmission having secondary inputs and having outputs connected to the secondary inputs of the summing transmissions so that when the compensating shaft is rotated in one direction the one input is rotated one way and the other the opposite way and vice versa. A planetary-gear transmission has a pair of separate inputs and an output connected to the compensating shaft. A variable speed hydrostatic transmission has its input connected to the main drive shaft and its output connected to one of the inputs of the planetary-gear transmission. A first clutch has one side connected to the output of the hydrostatic transmission and to one input of the planetary-gear transmission and another side connected to the compensating shaft. A second clutch has one side connected to the other input of the planetary-gear transmission and another side operatively connected to the main drive shaft. This first clutch is closed and the second clutch is open for low-range steering, and vice versa for high-range steering for a sharp turn.