Yieldable roof support system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 28, 1995
Issued Date -
N/A
app pub date -
Apr 10, 1992
filing date -
Jan 22, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A support includes a base member having an open end and a hollow interior, a forcing member having an end extending through the open end of the base member into the hollow interior thereof and having threads thereon and a mandrel or sliding nut capable of engaging the threads of the forcing member at an adjustable position and providing an interfering relationship between the base and forcing members as a compressive load is applied thereto. The support is particularly adapted for use in supporting the roof of a mine.
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Cited Art Landscape
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