Roof support suitable for use in mines
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United States of America Patent
Stats
-
Feb 7, 1984
Grant Date -
N/A
app pub date -
Nov 17, 1981
filing date -
Nov 27, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A roof support suitable for use in mines includes roof-engageable means provided with a roof-engageable pad which is so mounted with respect to the remainder of the roof-engageable means as to be movable with respect thereto for exerting a thrust on the mine roof. A linkage is pivotally connected between the pad and the remainder of the roof-engageable means. Actuator means is so pivotally connected to and supported by the linkage that when operated it effects movement of the pad with respect to the remainder of the roof-engageable means, being itself constrained, simultaneously upon such movement, to move bodily with the pad.
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Cited Art Landscape
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