Machine element or mechanism – Mechanical movements – Rotary to rotary
Patent
1987-05-19
1988-04-26
Braun, Leslie A.
Machine element or mechanism
Mechanical movements
Rotary to rotary
742163, F16H 1104, F16H 342
Patent
active
047396687
ABSTRACT:
A power-transmitting and torque-converting positive drive system provides an infinitely variable (IV) ratio of angular speed adjustments between a power input shaft and a power output shaft. The power is transmitted by means of a continuous chain of balls pushing one another forward. These balls interact with the input shaft and the output shaft by means of the cooperation of two groups of balls simultaneously constrained between sets of associated short straight grooves and corresponding helical grooves. One group of balls is located between the input shaft and a sleeve, whereas the other group of balls is located between the output shaft and that sleeve. The balls are guided and restrained in a plurality of open-loop channels that enable each ball to progressively shift from one group to another, each ball acting as the individual tooth of a gear. These open loops are interconnected to form an endless closed loop housed in the sleeve structure nestled between the input shaft outer surface and the inner surface of a portion of the output shaft that surrounds a corresponding portion of the input shaft. Reverse speed and torque control features are provided. Slippage is altogether eliminated. Locking of the input shaft and/or the balls automatically locks the output shaft.
REFERENCES:
patent: Re26476 (1968-10-01), Kuehnle
patent: 2082433 (1937-06-01), Whitcomb
patent: 2764030 (1956-09-01), Mackta
patent: 3807243 (1974-04-01), Yada
Anchell Scott
Braun Leslie A.
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