Damper blade construction

Details Damper blade construction Damper blade construction

1985-06-12

1986-09-09

Schwartz, Larry L.

Fluid handling

Flow affected by fluid contact, energy field or coanda effect

Means to regulate or vary operation of device

98114, 981212, 137601, 251305, F24F 1314

Patent

active

046101977

ABSTRACT:
A hollow airfoil damper blade formed by sheet metal. The walls of the blade are formed by two sheets crimped together at the edges. The blade tapers from the center toward the edges and has two pairs of V-shaped stiffening ribs formed by corrugations in the sheets. The ribs project nearly one half the blade thickness to enhance the strength of the blade and its resistance to deflection. The ribs cooperate to form a channel which closely receives a stub axle in each of its ends to provide for pivotal mounting of the damper blade. The axles are contacted directly by and welded to each of the ribs.

REFERENCES:
patent: 2022640 (1935-11-01), Ullmann
patent: 3084715 (1963-04-01), Scharres
patent: 3191241 (1965-06-01), Johnson
patent: 3547152 (1970-12-01), Hess
patent: 3771559 (1973-11-01), Alley
patent: 3885347 (1975-05-01), Adachi et al.
patent: 3894481 (1975-07-01), Alley
patent: 3918283 (1975-11-01), Kosch et al.
patent: 4256143 (1981-03-01), Magill et al.
patent: 4275762 (1981-06-01), Field

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