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:
May. 25, 2010
Filed:
Oct. 20, 2005
Markus Liebherr, Bulle, CH;
Josef Häglsperger, Gangkofen, DE;
Peter Dziuba, Frickingen-Altheim, DE;
Josef Bauer, Nandlstadt, DE;
Manfred Kirchhoff, Eggersdorf, DE;
Markus Liebherr, Bulle, CH;
Josef Häglsperger, Gangkofen, DE;
Peter Dziuba, Frickingen-Altheim, DE;
Josef Bauer, Nandlstadt, DE;
Manfred Kirchhoff, Eggersdorf, DE;
Mali Holding AG, Fribourg, CH;
Abstract
A power-branched transmission, particularly for agricultural vehicles such as tractors or similar, includes a stepped planetary gear which is disposed between an input shaft and an output shaft and is used for dividing the power supplied at the input shaft onto a mechanical power branch and a hydraulic power branch. The hydraulic power branch is formed by two hydraulically interconnected, identical hydrostatic axial piston engines which can be selectively operated as a pump or an engine, can be swiveled within a predefined pivoting angle, and can be connected to the input shaft or the stepped planetary gear in a different manner via two respective clutches so as to cover different operating ranges or running steps. In order to obtain better efficiency in such a power-branched transmission, the two hydrostatic axial piston engines are configured as wide-angle hydrostats that are provided with a minimum pivoting angle range of 45°.