Fluid reaction surfaces (i.e. – impellers) – Ambient fluid or exhaust gas directed through hub – fairing...
Patent
1977-05-25
1979-10-02
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Ambient fluid or exhaust gas directed through hub, fairing...
416169A, 416229R, 416241A, F04D 2934
Patent
active
041696930
ABSTRACT:
A fluid coupling device and fan mounting arrangement is disclosed. The fan is of the type having a hub portion and a plurality of fan blades integrally molded therewith from a plastic material and an annular spider having its outer periphery attached to the hub portion and a plurality of inwardly extending tabs bolted to bolt bosses projecting forwardly from the front surface of the output coupling member. The bolt bosses define a bolt circle having a radius R.sub.1 and the output coupling member includes a plurality of pilot portions defining a pilot diameter of radius R.sub.2, wherein R.sub.2 is greater than R.sub.1. The annular spider includes a plurality of inwardly extending pilot tabs, each of which engages the outer periphery of one of the pilot portions of the output member. The outboard pilot arrangement of the invention facilitates machining of the pilot diameter of the output member and minimizes the amount of surface-to-surface engagement of the spider and output member to minimize the heat transfer from the ouput member to the spider.
REFERENCES:
patent: 3642382 (1972-02-01), Hayashi
patent: 3749519 (1973-07-01), Ryba
Eaton Corporation
Kasper L.
McCloskey R. J.
Powell Jr. Everette A.
Yakimow J.
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