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:
Feb. 15, 2022
Filed:
May. 29, 2018
Applicant:
Liebherr-werk Nenzing Gmbh, Nenzing, AT;
Inventors:
Hans Reinhardt, Bürs, AT;
Wilhelm Kräutler, Koblach, AT;
Assignee:
Liebherr-Werk Nenzing GmbH, Nenzing, AT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E02F 9/22 (2006.01); E02F 5/14 (2006.01); F16H 39/02 (2006.01); E02D 17/13 (2006.01); E02F 5/08 (2006.01); F15B 11/16 (2006.01); F16H 61/44 (2006.01);
U.S. Cl.
CPC ...
E02F 5/14 (2013.01); E02D 17/13 (2013.01); E02F 5/08 (2013.01); E02F 9/2235 (2013.01); E02F 9/2292 (2013.01); E02F 9/2296 (2013.01); F15B 11/16 (2013.01); F15B 11/161 (2013.01); F16H 39/02 (2013.01); F15B 2211/20546 (2013.01); F15B 2211/25 (2013.01); F15B 2211/7058 (2013.01); F15B 2211/71 (2013.01); F15B 2211/78 (2013.01); F16H 61/44 (2013.01);
Abstract
A work machine, preferably a mobile work machine, has an attachment device, in particular a trench cutter. The attachment device has at least two adjustable hydraulic motors for driving independent, individually controllable loads. The hydraulic supply of the adjustable hydraulic motors takes place by a hydraulic drive unit arranged externally from the attachment device, in particular by a drive unit of the work machine. The at least two adjustable hydraulic motors of the attachment device are connected to a constant pressure network provided by the hydraulic drive unit.