F - Mech Eng,Light,Heat,Weapons – 24 – F
Patent
F - Mech Eng,Light,Heat,Weapons
24
F
98/54
F24F 13/10 (2006.01) A62C 2/16 (2006.01)
Patent
CA 1143604
-1- ROGERS, BERESKIN & PARR CANADA ABSTRACT OF THE DISCLOSURE Fire dampers are disclosed for use in air ducts to arrest the flow of gases and flame through the ducts in the event of a fire. The dampers each include a frame defining a generally rectangular central opening and a plurality of blades which are normally disposed in a folded position at one side of the frame but which can be moved by spring means to an un- folded position in which they extend across the opening of the frame in the event of a fire. A fusible link means normally retains the blades in their folded position. Locking members are provided for retaining the blades in their unfolded posi- tion after they have been released by the fusible link means. In one embodiment, the locking members engage integral tabs formed on the endmost blade. In another embodiment, the end- most blade has an end portion which is deflected at an acute angle with respect to the remainder of the blade and which en- gages over locking brackets secured to the frame.
343669
Hart Andrew J.
Nailor Michael T.
Bereskin & Parr
Nailor-Hart Industries Limited
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