Infinitely variable traction roller transmission

Details Infinitely variable traction roller transmission Infinitely variable traction roller transmission

1989-10-30

1991-03-05

Herrmann, Allan D.

Machine element or mechanism

Gearing

Toothed gear and recirculated unconnected elements

741905, 74208, F16H 1538

Patent

active

049968912

ABSTRACT:
In an infinitely variable transmission wherein two toric traction discs are rotatably supported opposite one another so as to define therebetween a toric cavity in which at least two motion transmitting traction rollers are disposed in engagement with the toric discs and supported by pivot trunnions, and in which each pivot trunnion is provided with a single support roller disposed on a track section and has an axial control end which is supported so as to be movable in a plane normal to the axis of the toric discs, the support rollers are engaged by track members which are tiltably supported and associated with the control ends of the trunnions so as to transmit transmission torque reaction forces to the track members for forcing the traction rollers into engagement with the toric discs and means are provided for controllably moving the trunnion control ends for initiation of a transmission ratio change.

REFERENCES:
patent: 4086820 (1978-05-01), Kraus et al.
patent: 4830578 (1989-05-01), Kraus
patent: 4911030 (1990-03-01), Kraus
patent: 4955246 (1990-09-01), Nakano

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