Machine element or mechanism – Gearing – Plural power paths to and/or from gearing
Patent
1975-05-02
1977-05-31
Scott, Samuel
Machine element or mechanism
Gearing
Plural power paths to and/or from gearing
F16H 5710
Patent
active
040261670
ABSTRACT:
A two-speed planetary transmission having a sun gear input and a carrier output includes a ring gear connectable to the carrier and to the fixed transmission housing by friction devices which are spring-biased toward the engaged position. The biasing spring for the ring-carrier friction device is carried by the ring and the friction device actuator. Shifting from one mode of operation to the other is effected by releasing the ring-housing friction device and engaging the ring-carrier friction device or by engaging the ring-housing friction device and releasing the ring-carrier friction device, thereby achieving shifting with a minimum of friction between the ring-carrier friction device spring and its non-rotating actuator. In the event of loss of control force to the friction device actuators the transmission becomes locked, and inertia forces from the load are absorbed by the friction devices without being transferred through the planet gears.
REFERENCES:
patent: 2472559 (1949-06-01), Arnold et al.
patent: 2870655 (1959-01-01), Rockwell
patent: 2918832 (1959-12-01), Meyers
patent: 3069929 (1962-12-01), Hansen
patent: 3093013 (1963-06-01), Forster et al.
patent: 3260331 (1966-07-01), Borman, Jr.
patent: 3359833 (1967-12-01), Flinn
patent: 3772940 (1973-11-01), Ohtsuka et al.
Chandler Lance W.
Scott Samuel
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