Noise reduction system for a rotary positive blower

Details Noise reduction system for a rotary positive blower Noise reduction system for a rotary positive blower

1997-09-22

1999-09-14

Warden, Robert

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

15321, 181224, A47L 500

Patent

active

059502738

ABSTRACT:
A rotary positive blower is driven by a drive device and has an intake port and an exhaust port. A plurality of conduit arrangements each having an inlet coupled to the exhaust port and an outlet, each of the plurality of conduit arrangements have a first predetermined diameter in at least a given portion; and a restriction is disposed in at least one of the plurality of conduit arrangements between the inlet and the outlet of this at least one arrangement, the restriction has a predetermined length and a second predetermined diameter less than the first predetermined diameter to cooperate in reduction of noise and improved efficiency of the drive device and the rotary positive blower.

REFERENCES:
patent: 3831223 (1974-08-01), Colt et al.
patent: 4109340 (1978-08-01), Bates
patent: 4158248 (1979-06-01), Palmer
patent: 4776303 (1988-10-01), Duthie et al.
patent: 4940082 (1990-07-01), Roden
patent: 5159738 (1992-11-01), Sunagawa et al.
patent: 5521340 (1996-05-01), Thawani et al.

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