Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Having wear liner – sheathing or insert
Patent
1990-12-17
1993-01-05
Denion, Thomas E.
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Having wear liner, sheathing or insert
416227R, 416227A, B63H 126
Patent
active
051765012
ABSTRACT:
A propeller system is formed on a shaft by at least one pair of axially spaced propeller blades each having a first and a second blade section extending at a selected acute (or obtuse) angle to the axis of the shaft, the first sections and second sections respectively of the pair of propeller blades are substantially parallel to each other and the tips of the first sections of each of the blades are connected to the tips of the second section of each of the blades respectively to form a box shape. The shaft is connected to the propeller system in a manner so that the axis of the shaft extends substantially diagonally of the box shape whereby the parallel sections of the blades move in opposite directions relative to the fluid in which they are contained when the shaft is rotated to facilitate improvement of the efficiency of the propeller system. The shaft preferably is mounted oriented to the direction of relative fluid flow between the propeller blades and the fluid so that each blade section extends substantially perpendicular to the direction of relative flow over a significant portion of its rotation and each blade section will be substantially parallel to the direction of fluid flow relative to the propeller blade during a further portion of the rotation of the propeller blades.
REFERENCES:
patent: 6914 (1849-11-01), Patch
patent: 1740596 (1929-12-01), Hohlt
patent: 3549444 (1970-12-01), Katz
patent: 3918839 (1975-11-01), Blackwell et al.
patent: 3928901 (1975-12-01), Schilling et al.
patent: 4624624 (1986-11-01), Yum
Design Engineering May 1984 p. 9.
Conference: Mankind's Future Source of Energy New Delhi, India Jan. 1978.
Denion Thomas E.
Rowley C. A.
The University of British Columbia
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