Fluid reaction surfaces (i.e. – impellers) – Rotor having flow confining or deflecting web – shroud or... – Radially extending web or end plate
Patent
1998-01-15
2000-03-07
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
Rotor having flow confining or deflecting web, shroud or...
Radially extending web or end plate
416186A, 416241A, 416183, 416188, 416189, 416192, B63H 116
Patent
active
060331836
ABSTRACT:
The invention relates to an impeller of a rotary pump having an annular upper part defining a central inlet opening, a drive-adjacent disk-shaped lower part, and a plurality of blades secured between the upper and lower parts. The upper and lower parts are separate parts which secure together. Each blade is integrally formed with either the upper part or the lower part. Every other blade is formed with the upper part, and the remaining blades are formed with the lower part. Each blade has a free edge, remote from a base thereof, which has a projection which extends into a recess or opening formed in the part to which it is not integrally molded. After the upper and lower parts are assembled together, free spaces around the projections are filled with injected plastic, thereby securing the upper and lower parts together and securing the free ends of the blades. This structure and molding process have the advantages of permitting arbitrarily curved impeller blades and facilitating manufacture in a minimum number of operating steps.
REFERENCES:
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patent: 4720242 (1988-01-01), Lovisetto
patent: 4759690 (1988-07-01), Deschamps et al.
patent: 4817856 (1989-04-01), Koistinen et al.
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WPI English Abstract of FR 2366469-A, Elektrobau Mulfingen GmBh, published 1978, Jun. 2, 1978.
WPI English Abstract of DE 3701085-B, Ossner/BMW, published 1988, Jan. 14, 1988.
WPI English Abstract of DE 3713310-A, Schaffer/BMW, published 1988, Aug. 25, 1988.
Look Edward K.
Oliver Milton
Shanley Matthew T.
Wilo GmbH
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