Machine element or mechanism – Gearing – Toothed gear and recirculated unconnected elements
Patent
1982-09-28
1985-02-19
Staab, Lawrence J.
Machine element or mechanism
Gearing
Toothed gear and recirculated unconnected elements
74190, 74193, 74199, 74201, F16H 1500, F16H 1516, F16H 1508
Patent
active
044997825
ABSTRACT:
A toroidal race rolling friction transmission unit in which hydraulic actuators act upon most of the rollers to cause them to change ratio angle, but in which one of the rollers has a mechanical mechanism by which precise increments of ratio-change may be imparted. A hydraulic device senses the torque reaction of that roller, and is hydraulically linked to the actuators of the other rollers so that they are subjected to a force equal to the reaction force experienced by the mechanically-actuated roller. The hydraulic actuators may be in the form of two-step piston-and-cylinder devices, the actuating forces being exerted in one step, while a damping force is exerted in the other step. In a "double-ended" transmission, in which a double-faced output disc is located between two oppositely-facing input discs, a single mechanically-actuated roller located between the output disc and one of the input discs may suffice, all the remaining rollers operating against either input disc being driven by hydraulic actuators, the pressure in all of which is related to that in reaction-sensing member of the first roller.
REFERENCES:
patent: 2850911 (1958-09-01), Kraus
patent: 3142189 (1964-07-01), Davis et al.
patent: 3153938 (1964-10-01), Perry
patent: 3276279 (1966-10-01), Perry et al.
patent: 3327545 (1967-06-01), Petty
patent: 3828618 (1974-08-01), Sharpe et al.
Bednarek Michael David
National Research Development Corporation
Staab Lawrence J.
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