Quiet by-pass vacuum motor

Details Quiet by-pass vacuum motor Quiet by-pass vacuum motor

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F04D 17/16 (2006.01) A47L 5/22 (2006.01) F04D 17/12 (2006.01) F04D 29/44 (2006.01)

Patent

CA 1261561

ABSTRACT OF THE DISCLOSURE A quiet by-pass vacuum motor wherein a ring-like cavity is defined between inner and outer walls of the housing for a working air fan. Sepa- rating members divide the cavity into passageways which communicate with openings in the housing. A plate having a plurality of vanes thereon is re- ceived upon the separating members, the plate ex- tending from the outer wall to a position short of the inner wall. A baffle plate is then received upon the vanes. Working air is exhausted over the baffle plate, between the vanes, over the plate and between the separating members and through the openings. The exhaust path greatly reduces the noise level of the vacuum motor.

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