Belted crawler having auxiliary drive wheel

Details Belted crawler having auxiliary drive wheel Belted crawler having auxiliary drive wheel

1988-03-17

1990-07-24

Marmor, Charles A.

Motor vehicles

Steering by driving

Independently operable drive motors

180 67, B62D 1104

Patent

active

049429345

ABSTRACT:
A crawler having a friction driven elastomeric belted track which is driven by rear mounted main drive wheels and front mounted auxiliary drive wheels. The auxiliary drive wheels are operatively coupled through hydraulic clutches to hydraulic motors that are fluidically coupled to a reversible variable displacement pump. An electronic controller controls the output of the pump so that the auxiliary drive wheels are driven at a speed less than the main drive wheels in the forward direction at a speed equal to or greater than the speed of the main drive wheels in the reverse direction. A valve assembly selectively couples and decouples the hydraulic clutches for engaging and disengaging the motor when turning the vehicle.

REFERENCES:
patent: 3298252 (1967-01-01), Harris et al.
patent: 4177870 (1979-12-01), Henn
patent: 4183419 (1980-01-01), Henn et al.
patent: 4186816 (1980-02-01), Pfundstein
patent: 4343680 (1984-03-01), Riediger et al.
patent: 4519465 (1985-05-01), Triplett
patent: 4546844 (1985-10-01), Stauffer
patent: 4560018 (1985-12-01), Satzler
patent: 4635743 (1987-01-01), Riehl
patent: 4678244 (1987-07-01), Furuta et al.

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