Round damper and fusible link therefor

Details Round damper and fusible link therefor Round damper and fusible link therefor

1984-06-29

1985-12-24

Joyce, Harold

Fluid handling

Flow affected by fluid contact, energy field or coanda effect

Means to regulate or vary operation of device

137 75, 137 77, 251305, F16K 1740

Patent

active

045598673

ABSTRACT:
A transversely circular fire damper having a butterfly type blade operated by a jack shaft spaced longitudinally of the housing from the blade axle. Linkage including an "over center" stop rotates the blade in one direction by operation of a motor coupled with the shaft. A clutch in the form of a pair of relatively telescoped members secured together with entectic solder is connected with the jack shaft and the motor so that the shaft is released from the motor when the ambient temperature reaches a point high enough to melt the solder. The jack shaft is spring biased in a direction to close the damper blade under such condition.

REFERENCES:
patent: 2640491 (1953-06-01), MacBain
patent: 3111300 (1963-11-01), Boone, Sr.
patent: 3727880 (1973-04-01), Stock
patent: 4432272 (1984-02-01), Becelaere

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