Hydraulic control for a longwall support

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United States of America Patent

PATENT NO 7458307
APP PUB NO 20060042243A1
SERIAL NO

11259995

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Abstract

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A hydraulic control for a longwall support with a plurality of face support frameworks (1-3), 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 (8, 9) 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 (16), which extends over the longwall length of a plurality of face support frameworks, via a group connection line (18), which can be blocked by a group stop valve (20) 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.

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Patent Owner(s)

Patent OwnerAddress
TIEFENBACH CONTROL SYSTEMS GMBHBOCHUM BOCHOLT NORTH RHINE-WESTPHALIA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kussel, Willi Werne, DE 14 83

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