Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Irregular – flanged or channel forming blade surface
Patent
1976-11-17
1977-12-06
Kelmachter, Barry L.
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Irregular, flanged or channel forming blade surface
416 74, 428902, B63H 1604
Patent
active
040611060
ABSTRACT:
An extremely light-weight racing paddle is disclosed which is formed of a very light-weight core of low structural strength surrounded by a shell formed of an extremely strong, light-weight fibrous material which supplies structural strength to the core material. The thickness of the fibrous material is varied along the shaft of the paddle so as to be thickest in the regions of highest stress. The blade of the paddle is reinforced by a selected pattern of fiber strips. Various embodiments of the basic paddle structure are disclosed, as is the method of making the paddle.
REFERENCES:
patent: 3883267 (1975-05-01), Baudier et al.
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