Title:
WATER JET PROPULSION UNIT FOR USE IN WATER BORNE CRAFT
Document Type and Number:
WIPO Patent Application WO2000038980
Kind Code:
A8
Abstract:
A water jet propulsion unit for water borne craft including two contra rotating impellers (5, 6), located in an upstream pump housing and a downstream pump housing respectively, and mounted on coaxial shafts (2, 3). A pressure control priming device (10) in the form of a spring loaded collapsible skirt is located between the impellers (5, 6). The pressure in the downstream pump housing can be maintained at atmospheric pressure by the controlled admission of air through air inlets (11).
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Inventors:
DAVIES RICHARD GWYN (NZ)
DAVIES BARRY JOHN (NZ)
DAVIES BARRY JOHN (NZ)
Application Number:
PCT/NZ1999/000229
Publication Date:
February 15, 2001
Filing Date:
December 24, 1999
Export Citation:
Assignee:
DAVIES RICHARD GWYN (NZ)
DAVIES BARRY JOHN (NZ)
DAVIES BARRY JOHN (NZ)
International Classes:
B63H11/08; B63H11/103; (IPC1-7): B63H11/08; B63H5/10
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