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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.:

US 10281034 B1

PDFFull Text
Date of Patent:
May. 07, 2019

Filed:

Oct. 22, 2015

Hydrostatic breaking concept

Applicant:

Danfoss Power Solutions Gmbh & CO Ohg, Neumünster, DE;

Inventor:

Andreas Schumacher, Kellinghusen, DE;

Assignee:

Danfoss Power Solutions GmbH & Co. OHG, Neumunster, DE;

Attorney:

McCormick, Paulding & Huber LLP

Primary Examiner:

Nathaniel E Wiehe

Assistant Examiner:

Daniel S Collins

Int. Cl.
CPC ...
F16H 61/421 (2010.01); F16H 61/431 (2010.01); F16H 61/4157 (2010.01); F16H 39/02 (2006.01); F16H 61/4017 (2010.01); F16H 59/68 (2006.01);
U.S. Cl.
CPC ...
F16H 61/4157 (2013.01); F16H 39/02 (2013.01); F16H 61/4017 (2013.01); F16H 61/421 (2013.01); F16H 61/431 (2013.01); F16H 2059/6869 (2013.01); F16H 2059/6876 (2013.01);
Abstract

Hydrostatic transmission and method for decelerating a hydrostatic transmission with a closed hydraulic fluid circuit, in which a hydraulic pump drivable by a drive engine and a hydraulic motor are arranged and connected fluidly to one another through two working lines. Alternately depending on the operational mode and on the conveying direction of the hydraulic pump, one working line is the low pressure line and the other one is the high pressure line. The hydraulic pump as well as the hydraulic motor are adjustable in their respective displacement volumes by means of a control unit. The hydraulic motor comprises a housing in which a hydrostatic drive mechanism having an inlet and an outlet is arranged. In a connecting line connecting the outlet and the inlet a pressure control valve is arranged, which can be flown through in direction to the inlet. The pressure control valve opens if the high pressure present at the outlet exceeds a predetermined pressure limit of the pressure relief valve. During the coasting operation of the hydrostatic transmission the displacement of the hydraulic pump and/or of the hydraulic motor are adjustable by means of the control unit in function of the speed of the drive motor or of the speed of the hydraulic pump.

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