Hydromechanical steering differential

Details Hydromechanical steering differential Hydromechanical steering differential

1980-03-10

1982-05-25

Mitchell, David M.

Motor vehicles

Steering by driving

Combined with manual steering

74687, 747105, 180 648, 180 65, B62D 1102

Patent

active

043312080

ABSTRACT:
Crawler tractor adapted for stepless hydromechanical steering by driving. The power train terminates in a novel hydromechanical steering differential delivering its output to an oppositely extending pair of axles at the sides of the tractor, and forced by a differential lock in a straight line locked, primary steering condition thereof to drive the axles at a mechanically fixed 1:1 drive ratio therebetween and, secondarily, forced into differentiating by a variable displacement crossfeeding pair of axle-interconnecting hydrostatic pump/motor units during all turns so as to selectively drive either axle only at some hydrostatically fixed reduction drive ratio to the other.

REFERENCES:
patent: 2336911 (1943-12-01), Zimmermann
patent: 2353554 (1944-07-01), Gates
patent: 2377354 (1945-06-01), Merritt
patent: 3461744 (1969-08-01), Booth

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