Transfer case

Details Transfer case Transfer case

1980-11-13

1983-02-15

Pekar, John A.

Motor vehicles

Having four wheels driven

With manually operated means for disengaging drive to one or...

192 485, 192108, B60K 1734

Patent

active

043736041

ABSTRACT:
A transfer case adapted for use in a four-wheel drive vehicle having two-wheel drive and four-wheel drive operating modes. The transfer case includes an inter-axle differential which permits general vehicle operation in the four-wheel drive mode. The transfer case also includes a chain and sprocket assembly which provides selective power transfer to one of the vehicle axles, normally the front axle. In the first operating state of the transfer case the chain and sprocket assembly is engaged with the inter-axle differential to transmit the drive torque to the front axle. In a second operating state, the chain and sprocket assembly is disengaged and no drive torque is transmitted to the front axle. The transition between operating states is effected by shifting of a clutch collar within the transfer case to control the engagement of the chain and sprocket assembly. This shifting is accomplished by controlled actuation of a vacuum motor.

REFERENCES:
patent: 1696179 (1928-12-01), Ahlm
patent: 3191708 (1965-06-01), Simonds et al.
patent: 3627072 (1971-12-01), Smirl
patent: 3929200 (1975-12-01), Behar
patent: 4298085 (1981-11-01), Moroto

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