Fire collar

Details Fire collar Fire collar

2005-11-01

2005-11-01

Krishnamurthy, Ramesh (Department: 3753)

Fluid handling

Destructible or deformable element controlled

Heat destructible or fusible

C137S075000, C137S079000, C251S315050, C251S315160

Reexamination Certificate

active

06959719

ABSTRACT:
A fire collar or fire damper for location within a concrete slab of a building. The device incorporates a damper arrangement (12) and a heat detector (18, 19) comprising a metal alloy or lead which melts when a preset temperature is reached, causing the damper arrangement to seal off associated pipework or ducting.

REFERENCES:
patent: 3782681 (1974-01-01), Blackstein
patent: 4084744 (1978-04-01), Wilson, Jr.
patent: 4742957 (1988-05-01), Mentuch
patent: 6161564 (2000-12-01), Cornwall
patent: 6279597 (2001-08-01), Schulze
patent: 399 210 (1995-04-01), None
patent: 41 03 987 (1991-10-01), None
patent: 44 44 503 (1996-02-01), None
patent: 0 472 937 (1992-03-01), None
patent: 2 242 846 (1975-03-01), None
patent: WO 88/06691 (1988-09-01), None

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