Hydraulic control for a longwall support
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 2, 2008
Grant Date -
Mar 2, 2006
app pub date -
Oct 26, 2005
filing date -
May 14, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
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.
First Claim
Other Claims data not available
