Planetary gear transmission systems or components – Variable speed or direction transmission combined with... – Transmission output shaft parallel to differential output...
Patent
1991-12-09
1993-03-23
Herrmann, Allan D.
Planetary gear transmission systems or components
Variable speed or direction transmission combined with...
Transmission output shaft parallel to differential output...
74606R, 192 4C, 475214, F16H 1510, F16H 3708
Patent
active
051959330
ABSTRACT:
A friction drive unit for use within a transaxle driving assembly in self-propelled vehicles such as grass-mowing lawn tractors, the transaxle comprising a two-piece housing structure forming a number of internal chambers for the encapsulation of the friction drive unit, associated reduction gearing and a mechanical differential. The friction drive may comprise as input members, a pair of driver wheels operatable against a larger driven disc wheel acting as the output member, such that only one driver wheel can be engaged to the driven wheel at any one time, and where the direction of vehicle motion depends on which one of the two driver wheels is in contact with the driven wheel. Each of the driver wheels is subjected to continuous rotation from an input drive shaft and are operatively displaced along the shaft by means of respective sliding yoke means. The output from the driven wheel is connected to the transaxle output shafts by means of high ratio gear reduction means.
REFERENCES:
patent: 661409 (1900-11-01), Lewis
patent: 1125132 (1915-01-01), Lambert
patent: 2719617 (1955-10-01), Stoltz
patent: 2808738 (1957-10-01), Bartell
patent: 4726256 (1988-02-01), von Kaler et al.
Arnold George D. M.
Thoma Christian H.
Herrmann Allan D.
Unipat AG
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