Machine element or mechanism – Mechanical movements – Rotary to rotary
Patent
1988-06-21
1989-08-15
Braun, Leslie A.
Machine element or mechanism
Mechanical movements
Rotary to rotary
742163, F16H 1104
Patent
active
048563579
ABSTRACT:
A power-transmitting and torque-converting mechanical drive system provides an infinitely variable (IV) ratio of angular speed adjustments between a first shaft and a second shaft. Power is transmitted by means of a plurality of independent chains of balls pushing one another forward. These balls interact with a first body of revolution mounted on the first shaft and a second body of revolution mounted on the second shaft by means of cooperating groups of balls simultaneously constrained between sets of cooperating straight grooves and corresponding helically-laid grooves located on facing surfaces of the bodies. One group of balls is located between the first body and a plurality of segment structures, whereas the other group of balls is located between the second body and the segment structures equipped with short straight grooves. The balls are guided and restrained in a plurality of closed-loop channels arranged to enable each ball to progressively move along each closed loop, each ball acting like an individual gear tooth. Each ball chain is housed in a channel enclosed in each segment slidable and centered between the body facing grooved surfaces. Torque control features are also provided. Slippage is altogether eliminated. Locking of either one of the shafts restrains the other shaft.
REFERENCES:
patent: 2512272 (1950-06-01), Gull
patent: 2749761 (1956-06-01), Mackta
patent: 2764030 (1956-09-01), Mackta
patent: 3752000 (1973-08-01), Roberts
patent: 4493222 (1985-01-01), Heine
patent: 4739668 (1988-04-01), David
Anchell Scott
Braun Leslie A.
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