Traction-drive transmission with hydraulic control

Details Traction-drive transmission with hydraulic control Traction-drive transmission with hydraulic control

1979-03-12

1981-06-02

Hunter, H. Hampton

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

74193, 74208, 74690, B60K 4114

Patent

active

042704154

ABSTRACT:
The invention contemplates an improved mechanical traction drive with a hydraulically implemented single control whereby a desired range of speed ratios between input and output shafts is selectively available, without requiring clutch connection to the power source, such as a battery-operated electric motor. The transmission employs a combination of completely mechanical friction-roller and meshing-gear planetary systems which are connected at all times, whether the single control is operated to call for a forward drive or a stop, and whether the motor is run in the direction to produce a forward or a reverse drive of the output shaft. Provision is made for automatically downshifting and upshifting the transmission via hydraulic means, in response to input-torque requirements and/or output-torque limitations.

REFERENCES:
patent: 3238816 (1966-03-01), Schottler
patent: 3299743 (1967-01-01), Stockton
patent: 4098145 (1978-07-01), Dickinson
patent: 4174640 (1979-11-01), Dickinson
patent: 4185509 (1980-01-01), McLarty

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