Channel for fire damper assembly

Details Channel for fire damper assembly Channel for fire damper assembly

1997-02-14

1999-03-09

Robinson, Ellis P.

Stock material or miscellaneous articles

All metal or with adjacent metals

Intermediate article

428577, 428580, 428121, 428130, 4285428, 454369, 220 62, 220 621, B21C 100

Patent

active

058798153

ABSTRACT:
A B-channel for use in a damper frame or sleeve is disclosed which is formed from a blank of sheet metal. The blank has a rectangular barrier wall, a pair of side walls formed along two opposing edges and end walls formed along opposing edges of the barrier wall. The side walls and end walls are folded perpendicularly to the barrier wall and tabs are formed on the end walls to be folded into the planes of the side walls. The B-channel is particularly useful in conjunction with a fire damper sleeve.

REFERENCES:
patent: 1177410 (1916-03-01), Hatfield
patent: 2300842 (1942-11-01), Leslie
patent: 3172347 (1965-03-01), Johnson
patent: 3307505 (1967-03-01), Windross
patent: 3800846 (1974-04-01), Kurz
patent: 4304427 (1981-12-01), McCabe
A one-page written report of Tim J. Schotz dated Jan. 3, 1996 including a drawing entitled "Conventional Sleeve `B` Channel", Fig. 1.

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