Mine gallery curtain and method
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jul 4, 2000
Issued Date -
N/A
app pub date -
Mar 28, 1997
filing date -
Apr 24, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A curtain for defining a barrier in an underground passageway between a pair of spaced-apart pillars, comprising a bladder defined by a pair of flexible sheets joined together by a plurality of cords which define a cavity between the sheets and being open at a top edge thereof. The bladder is fastened to a ceiling of an underground passageway between a pair of spaced-apart pillars therein. A rigid foam is disposed within the cavity, being formed of a flowable hardenable material introduced into the cavity. A fire-retardant coating is applied to exposed surfaces of the bladder after the hardenable material has hardened. A method of closing gaps between pillars in mine galleries is disclosed.
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