Metal working – Method of mechanical manufacture – Impeller making
Patent
1994-08-08
1996-03-26
Cuda, Irene
Metal working
Method of mechanical manufacture
Impeller making
2952504, B23P 1500
Patent
active
055010105
ABSTRACT:
An improved method of assembling a fan (31) and a fan drive (11) is disclosed in which a bolt (25) is threaded into each of the bores (23) defined by the body (13) of the fan drive. Each bolt is positioned such that the head portion (29) is separated from an adjacent surface (47) of the body by an axial dimension at least equal to the axial thickness (X) of the spider (33) of the fan assembly. The fan has keyhole shaped fastener openings (41) including a larger portion (43) and a smaller portion (45). The fan (31) is positioned on the fan drive with the bolt heads extending through the larger portions (43) of the fastener openings. The fan is then rotated relative to the fan drive to a position in which the threaded portion (27) of each fastener is received within the smaller portion (45) of the fastener opening. Finally, the bolts are tightened against the fan spider (33). This method of assembly substantially eliminates the opportunity for bolt strippage in the OEM assembly plant, where the fan and fan drive are assembled.
REFERENCES:
patent: 3642382 (1972-02-01), Hayashi
patent: 3914069 (1975-10-01), Arrington et al.
patent: 4150919 (1979-04-01), Matucheski
patent: 4252504 (1981-02-01), Covington et al.
patent: 4487551 (1984-12-01), Mizutani et al.
patent: 5002462 (1991-03-01), Janisse
Cuda Irene
Eaton Corporation
Kasper L. J.
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