Rotary kinetic fluid motors or pumps – With means for re-entry of working fluid to blade set – Cross flow runner
Patent
1998-07-16
2000-06-20
Ryznic, John E.
Rotary kinetic fluid motors or pumps
With means for re-entry of working fluid to blade set
Cross flow runner
4152082, F04D 500, F04D 2300, F01D 102
Patent
active
060770325
ABSTRACT:
A motor housing for a vacuum cleaner includes a main body, a peripheral rim, and an interconnecting base bounding portions of a working air chamber. A portion of the peripheral rim defines a sidewall having a plurality of vanes and a plurality of exhaust openings, with the vanes and the exhaust openings cooperating to exhaust air from the working air chamber in response to rotation of the impeller. Each of the vanes having an airfoil-shaped cross section, and each vane is oriented such that the airfoil of each vane is oriented oppositely relative to the airfoil of its adjacent vanes. Thus, a first set of the vanes are positioned to direct air through the exhaust openings, while a second set of vanes are positioned to direct excess air from adjacent the exhaust openings toward the chamber and back into the flow pattern. The excess air is thus smoothly remixed at a different velocity with the air moving through the working air chamber such that synchronization of the air flow is reduced, and harmonic induced noise is minimized.
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Baer Mark E.
Wolfe, Jr. Melvin E.
Felchar Manufacturing Corporation
Ryznic John E.
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