Fluid reaction surfaces (i.e. – impellers) – Support mounting – carrier or fairing structure
Patent
1996-03-21
1997-01-14
Larson, James
Fluid reaction surfaces (i.e., impellers)
Support mounting, carrier or fairing structure
416169A, F04D 2964
Patent
active
055932835
ABSTRACT:
A fan (31) and fan drive (11) assembly in which the fan includes a spider (33), typically a metal stamping, defining fastener openings (41), each including larger opening (43) and a smaller opening (45). Adjacent the smaller opening, the spider defines a raised ramp portion (47). The fan drive includes an output (13) defining fan mounting portions (21), each of which includes a head portion (25), and a shank portion (27). Upon assembly, the head portions (25) align with, then pass axially through the larger openings (43), then the fan is rotated relative to the fan drive, resulting in the shank portions (27) moving into the smaller openings (45) and the head portions (25) passing over and deforming the ramp portions (47), thus tightly engaging the fan spider (33) to the fan drive output member (13). The invention provides an assembly and method which eliminate the need for bolts, and the associated drilling and tapping of threaded holes in the output member, as well as the time-consuming bolting process in the assembly plant, and the periodic bolt strippage and associated warranty problems.
REFERENCES:
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patent: 3914069 (1975-10-01), Arrington et al.
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patent: 4169693 (1979-10-01), Brubaker
patent: 4252504 (1981-02-01), Covington et al.
patent: 4271946 (1981-06-01), Bridge
patent: 4487551 (1984-12-01), Mizutani et al.
patent: 4735300 (1988-04-01), Brown
patent: 5002462 (1991-03-01), Janisse
Eaton Corporation
Kasper L. J.
Larson James
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