Fluid reaction surfaces (i.e. – impellers) – Specific working member mount – Blade held between separable surfaces
Patent
1994-02-02
1995-10-17
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
Specific working member mount
Blade held between separable surfaces
416230, 416220A, F04D 2934, F04D 2938
Patent
active
054584655
ABSTRACT:
A fan impeller has a hub and fan blade units with fan blades connected to the hub. The fan blade units are made of plastic material reinforced with first fibers for transmitting forces acting on the fan blades into the hub. The first fibers extend substantially parallel to a longitudinal direction of the fan blades. The first fibers are bundled at a radially inner end of the fan blades to form a tubular structure. The tubular structure has a free end that is bent radially outwardly substantially about 180.degree. to form an end ring. The end ring has a convex surface facing the hub and a concave surface facing the fan blade. Each fan blade unit has a fastening element with an annular groove for receiving the end ring, the fastening element connected to the hub. Each fan blade unit further has a fastening ring inserted into the concave surface. The fastening ring clamps the end ring at the fastening element. Screws extend through the fastening ring, the end ring, and the fastening element for connecting the blade unit to the hub.
REFERENCES:
patent: 2155375 (1939-04-01), Jablonsky
patent: 2182812 (1939-12-01), Lougheed
patent: 4260332 (1981-04-01), Weingart et al.
patent: 4407635 (1983-10-01), Grimes et al.
patent: 4915590 (1990-04-01), Eckland et al.
patent: 4966527 (1990-10-01), Merz
patent: 5096384 (1992-03-01), Immell et al.
Derwent Abstract 90-210875, Hoffmuller et al, pp. 1-2.
Derwent Abstract 88-148459, Sikorski, pp. 1-3.
ry Huba
von Wieser Carlos W.
Wohler Hans-Joachim
Balck-Durr Aktiengesellschaft
Larson James
Look Edward K.
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