Selectively operable rotary drive means

Details Selectively operable rotary drive means Selectively operable rotary drive means

1984-08-23

1985-09-10

Levy, Stuart S.

Rotary shafts, gudgeons, housings, and flexible couplings for ro

Electrical or magnetic coupling

74198, 74751, 74798, 192 84T, 310 62, F16D 2700, F16H 3706, F16H 1508, H02K 906

Patent

active

045403813

ABSTRACT:
An alternator cooling fan drive includes a radial bearing, the outer race of which mounts the fan within the magnetic field produced by the alternator under load. The bearing has pathways with a curvature close enough to the balls that the races will self-center and transmit a minimum torque to the fan when the magnetic field is weak. The pathway and ball configurations are sufficiently divergent that when the magnetic field pulls in on the fan, the races can misalign and wedge the balls more tightly between the races to transmit more torque to the fan. The fan drive is thus more directly responsive to the need for cooling.

REFERENCES:
patent: 2820440 (1958-01-01), Jacobs
patent: 3727473 (1973-04-01), Bayer
patent: 3865222 (1975-02-01), Briar
patent: 4033438 (1977-07-01), Wiltsey
patent: 4258589 (1981-03-01), Mitchell
patent: 4437846 (1984-03-01), Ragaly
patent: 4446391 (1984-05-01), Sekine et al.

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