Fluid reaction surfaces (i.e. – impellers) – Support mounting – carrier or fairing structure
Patent
1978-09-05
1981-01-20
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Support mounting, carrier or fairing structure
416214R, 403242, F04D 2920
Patent
active
042459605
ABSTRACT:
A structure for interlocking relatively thin sheet material with a relatively heavy member, such as, for example a hub member with a sheet metal fan blade structure and the like to provide a rigid durable interlocking connection therebetween, in which, in the example given, the hub member is provided with an annular sleeve which extends through a bore in the central portion of the fan blade or other member, the hub member having an upstanding flange in the form of an annular shoulder spaced rearwardly from the free end of the sleeve and of greater diameter than the latter, with the shoulder being radially spaced from the sleeve by a groove having a radial width approximately equal to the thickness of the sheet member. The sleeve is divided into a plurality of segments, alternate segments flaring outwardly into engagement with the material of the blade member forming the periphery of the bore therein, and the free ends of the intermediate segments being bent over and forced into the material of the sheet member, moving the adjacent material thereof into the groove and forming, in effect, a spline-like connection between the two members.
REFERENCES:
patent: 2794509 (1957-06-01), Mix
patent: 3734697 (1973-05-01), Sieghartner
patent: 3937595 (1976-02-01), English et al.
Air Drive, Inc.
Powell Jr. Everette A.
Trausch, III A. N.
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