Composite fire stop device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 10, 1989
Grant Date -
N/A
app pub date -
Apr 3, 1987
filing date -
Aug 6, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fire stop collar assembly comprises a plastics sleeve (2) which fits over a plastics pipe. An annular collar (4) of intumescent material is supported by the external surface of the sleeve (2). A tension spring (8) is held under tension on an end of the sleeve (2), with a sheath of refractory fabric (6) being interposed between the spring (8) and the sleeve (2). Upon softening of the pipe and sleeve (2) in the event of a fire, the spring (8) will act to constrict the sleeve and the pipe within the refractory sheath.
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