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. 02, 2008
Filed:
Oct. 26, 2005
Willi Kussel, Werne, DE;
Willi Kussel, Werne, DE;
Tiefenbach Control Systems GmbH, Essen, DE;
Abstract
A hydraulic control for a longwall support with a plurality of face support frameworks (-), which are adapted to be actuated in the sense of longwall support functions, in particular in the sense of the longwall support operations: robbing, advancing, and setting, comprises hydraulic control valves () for each of the biasing elements, which are each arranged in close spatial relationship with the biasing elements, and subdivided into groups. Each group connects to a hydraulic pressure line (), which extends over the longwall length of a plurality of face support frameworks, via a group connection line (), which can be blocked by a group stop valve () as a function of the actuation of the control valves, specifically, when all control valves are not actuated and all biasing elements of the group are in a static state.