Intumescent fire door lock mechanism
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 10, 1995
Grant Date -
N/A
app pub date -
Jul 26, 1993
filing date -
Jul 26, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A lock mechanism including a latch assembly for being attached to a movable door member and for movement between an extended position in which the movable door member is locked in a closed position and a retracted position in which the movable door member is allowed to move between opened and closed positions. A holding assembly is included for normally holding the latch assembly in the retracted position. Intumescent material is included for forcing the latch assembly to the extended position if subjected to heat above a certain temperature.
First Claim
Family
International Classification(s)
Cited Art Landscape
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