Chimney damper with locking mechanism

Details Chimney damper with locking mechanism Chimney damper with locking mechanism

1995-02-23

1996-09-17

Joyce, Harold

Ventilation

Chimney or stack

Chimneytop or stacktop structure

251 89, F23L 1710

Patent

active

055563295

ABSTRACT:
A chimney damper is provided with a locking mechanism which prevents the chimney damper from closing in the event of a chimney fire.

REFERENCES:
patent: 2242738 (1941-05-01), Alton
patent: 2313350 (1943-03-01), Lebus
patent: 4020754 (1977-05-01), Dalsin et al.
patent: 4481933 (1984-11-01), Sawtelle
patent: 5125869 (1992-06-01), VonSick
patent: 5163516 (1992-11-01), Palmatier
patent: 5193622 (1993-03-01), Tibbling
patent: 5247998 (1993-09-01), Fallon

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