Casing of blower and ventilating fan utilizing the casing

Details Casing of blower and ventilating fan utilizing the casing Casing of blower and ventilating fan utilizing the casing

1982-03-10

1986-01-07

Davis, Jr., Albert W.

Rotary kinetic fluid motors or pumps

With sound or vibratory wave absorbing or preventing means...

417312, 417350, 417360, 417363, 165 54, 165 7, F04D 2966

Patent

active

045631263

ABSTRACT:
A casing of a blower of the improved construction easy to assemble and low in noise level, and a ventilating fan utilizing such casing. The casing of the blower includes a frame, and spiral cases arranged in the frame and having suitable elasticity with respect to the frame, the spiral cases having external dimensions slightly larger than the internal dimensions of the frame in natural condition, so that the spiral cases can be securedly held in place in the frame by the elasticity of the spiral cases themselves.

REFERENCES:
patent: 3174682 (1965-03-01), Wilfert et al.
patent: 3688867 (1972-09-01), Antonetti et al.
patent: 3947148 (1976-03-01), Holt

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