Hydrostatic-drive tractor

Details Hydrostatic-drive tractor Hydrostatic-drive tractor

1978-09-18

1981-06-23

Love, John J.

Motor vehicles

Special wheel base

Having only three wheels

60487, 180 54E, 180292, B60K 500

Patent

active

042745055

ABSTRACT:
A narrow gauge, hydrostatic-drive tractor comprises an air-cooled prime mover, a Sundstrand hydraulic transmission mechanically coupled thereto, a fixed-displacement hydraulic motor hydraulically coupled to the Sundstrand transmission, an air conduit extending vertically upward from the fan housing of the prime mover for supplying ambient air to cool the prime mover, and cooling device disposed in the air conduit functioning to cool the hydraulic fluid. The motor is disposed beneath the fan housing and is coupled through a differential to drive wheels which, advantageously, have a diameter substantially the same as the width of the tractor. Advantageously, also, a manually-operated selector valve and a pressure-actuated cross-over relief valve is provided for by-passing the motor to protect the motor and to permit the tractor to be moved manually. There is also disclosed a scraping device for use with the above or like narrow gauge tractor.

REFERENCES:
patent: 2327848 (1943-08-01), Schroeder
patent: 3208222 (1965-09-01), Wilmes
patent: 3581498 (1971-06-01), Cudnohufsky
patent: 3727712 (1973-04-01), Colloton
patent: 3863449 (1975-02-01), White

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