Impeller for marine propulsion device

Details Impeller for marine propulsion device Impeller for marine propulsion device

2005-02-22

2005-02-22

Sotelo, Jesus D. (Department: 3617)

Marine propulsion

Jet drive

C416S23100A, C440S047000

Reexamination Certificate

active

06857919

ABSTRACT:
An impeller for a jet propulsion device includes at least one fluid channel formed on each impeller blade. During impeller rotation, a fluid back-flow is generated through the fluid channels. The back-flow advantageously sweeps cavitation bubbles away from the impeller blades and inhibit their implosion on the blade surfaces and/or inner housing surface which lies adjacent the blade tips. This desirably reduces erosion and provides a long-life and efficient propulsion device.

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Author Unknown, Cavitation for the Technologically Challenged, date unknown, published on the internet under http://www.buckeyepumps.com/Cavitation.html.
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Co-pending patent application: U.S. Appl. No. 09/280,129, filed Mar. 26, 1999, entitled Induction System for Watercraft Engine, in the name of Ito et al., and assigned to Yamaha Hatsudoki Kabushiki Kaisha.

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