Machine element or mechanism – Gearing – Plural power paths to and/or from gearing
Patent
1981-04-10
1984-10-16
Braun, Leslie A.
Machine element or mechanism
Gearing
Plural power paths to and/or from gearing
192 58B, 192 82T, 192 12B, F16H 374
Patent
active
044767447
ABSTRACT:
A multi-speed fan drive apparatus is disclosed which includes a pair of concentric shafts rotatable relative a fixed support and carrying clutch plates engageable to stop rotation of the shafts relative the fixed support. A pair of different-sized sun gears are carried on the two shafts and are intermeshed with planet gears rotatably mounted upon a planet gear carrier. Drive means is provided for driving the planet gear carrier in a given direction and a ring gear, with a fan blade connected thereto, is intermeshed with the planet gears. Means are provided for stopping rotation of one or the other of the sun gears with respect to the fixed support, and also for causing the shafts and sun gears to rotate in unison with the planet gear carrier and therefore the ring gear, to obtain three speeds of operation. Alternate embodiments are also disclosed which include different means for limiting rotation of the sun and ring gears, and in one embodiment there is included a single sun gear and planet gear arrangement providing a two-speed apparatus.
REFERENCES:
patent: 2266740 (1941-12-01), Cotterman
patent: 2945570 (1960-07-01), Ferguson et al.
patent: 3359831 (1967-12-01), Scheiter
patent: 3532008 (1970-10-01), Fanstone
patent: 3721135 (1973-03-01), Kelley
patent: 3804219 (1974-04-01), Cummings
patent: 3972399 (1976-08-01), Bopp
patent: 4036339 (1977-07-01), Kikuchi
patent: 4046239 (1977-09-01), Pinholt
patent: 4064980 (1977-12-01), Tinholt
patent: 4265135 (1981-05-01), Smirl
Braun Leslie A.
McKenzie, Jr. Frank H.
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