FIRE-RETARDING FLAP Russian patent published in 2003 - IPC

Abstract RU 2195984 C2

FIELD: fire-fighting equipment. SUBSTANCE: apparatus has casing, rotary flap, lever, spring, flap retainer with thermal lock and counterweight, and electric heater contacting with thermal lock and switched by command from control panel. Retainer is formed as hook fixed with its one end on pin inside casing on its lower side. Thermal lock is defined by working engageable part of hook made from alloy with shape memory effect. Flap may be manually closed, with thermal lock being retained. Thermal lock may be repeatedly used in case flap is automatically actuated or actuated by remote control system from control panel. Flap of such construction is used in units for blocking fire spreading in air ducts, shafts and ventilation and conditioning system channels, as well as for protecting spaces in guarding systems of buildings and constructions of different purpose from fire. EFFECT: simplified construction and increased efficiency. 2 cl, 3 dwg

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RU 2 195 984 C2

Authors

Grishkov V.N.

Lotkov A.I.

Panin V.E.

Kozubov V.I.

Timkin V.N.

Dates

2003-01-10—Published

2001-01-12—Filed