PROPELLER BLADE

Title:

PROPELLER BLADE

Document Type and Number:

WIPO Patent Application WO/2011/116231

Kind Code:

A3

Abstract:

A propeller blade includes a body configured to extend radially from the hub of a propeller. The body can include a front surface, a back surface, a leading edge, and a trailing edge. The top of the body can form a tippet that generally transitions the front and back surfaces from extending in a generally radial direction to a generally axial direction. The tippet can reduce radial flow and force losses, redirect the radial flow in an axial direction, reduce the exit flow area of the propeller, and increase the inlet flow area of the propeller. The front surface of the blade can have a planar configuration that prevents or reduces the creation of low or negative pressure across the front surface of the blade and associated cavitation.

Inventors:

TOPAZ STEPHEN R (US)
TOPAZ PETER A (US)
POWERS WARREN L (US)

Application Number:

PCT/US2011/028882

Publication Date:

January 12, 2012

Filing Date:

March 17, 2011

Export Citation:

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Assignee:

SP TECH (US)
TOPAZ STEPHEN R (US)
TOPAZ PETER A (US)
POWERS WARREN L (US)

International Classes:

F03D1/06; F03D11/00

Foreign References:

US6302652B1	2001-10-16
US20090226323A1	2009-09-10
US6352408B1	2002-03-05
US20070248466A1	2007-10-25
JP2003206894A	2003-07-25

Other References: