Continuously variable traction roller transmission

Details Continuously variable traction roller transmission Continuously variable traction roller transmission

1989-02-22

1990-05-29

Herrmann, Allan D.

Machine element or mechanism

Gearing

Toothed gear and recirculated unconnected elements

74201, F16H 1538

Patent

active

049285424

ABSTRACT:
Herein disclosed is a continuously variable traction roller transmission of a double cavity type. The transmission comprises a casing; a partition wall installed in the casing to define front and rear cavities in the same; a first shaft extending through the front and rear cavities; first and second motion transmitting traction mechanisms respectively installed in the front and rear cavities, each mechanism being disposed about the first shaft and operatively connected to the same; first and second control valve body structures respectively installed in the front and rear cavities, each structure producing a hydraulic pressure for controlling the corresponding motion transmitting traction mechanism; a second shaft extending through only the rear cavity; and a mechanism for operatively connecting the second shaft to both of the first and second motion transmitting traction mechanisms. The second control valve body structure has a passage through which the second shaft is passed.

REFERENCES:
patent: 744550 (1903-11-01), Hoffman
patent: 817239 (1906-04-01), Graves
patent: 2073134 (1937-03-01), Almen et al.
patent: 2646696 (1953-07-01), Kepes
patent: 3371546 (1968-03-01), Spangler et al.
Kraus et al., "A Continuously Variable Transmission for Automotive Fuel Economy", Society of Automotive Engineers, Inc., Paper 751180, 2 pages.
Carson, "New and Better Traction Drives are Here", Machine Design, Apr. 18, 1974.

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