Bolt closure maintenance for fire-degraded latching assembly

Details Bolt closure maintenance for fire-degraded latching assembly Bolt closure maintenance for fire-degraded latching assembly

1997-02-18

1998-07-21

Dorner, Kenneth J.

Closure fasteners

Bolt guides

292 92, 29234117, 70DIG10, E05B 6510, E05B 1502, E05B 1720

Patent

active

057825092

ABSTRACT:
In a door closure assembly, the combination comprising a latch bolt element; carrier structure to carry the bolt element to pivot between door unlatched and latched position; and means carried by a fire resistant portion of the assembly to be responsive to an increase in temperature to a level T to move into position to block door unlatching movement of the bolt element from door latching position.

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