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:
Jan. 08, 2002
Filed:
May. 25, 2000
Reinhold Schniederjan, Neu-Ulm, DE;
Bernhard Adler, Elchingen, DE;
Brueninghaus Hydromatik GmbH, Elchingen, DE;
Abstract
A control circuit, in particular for a slewing gear of a digger, has a hydraulic fluid tank ( ), connected to two adjusting pressure chambers ( ). Each of the connections contains a separate brake valve ( ). The first of the valves ( ) is operated by the differential between the working pressure in the first working conduit ( ), and the control pressure in the control conduit ( ) charged with the higher pressure. The second valve ( ) is operated by the differential between the working pressure in the second working circuit ( ) and the control pressure in the control circuit charged with the higher pressure. Slow braking by the brake valves is interrupted when the slewing gear swings out against a resistance such as a heap of debris.