Motor vehicles – Having four wheels driven – With differential means for driving two wheel sets at...
Patent
1991-03-13
1993-05-18
Focarino, Margaret A.
Motor vehicles
Having four wheels driven
With differential means for driving two wheel sets at...
192 60, 60325, B60K 17344
Patent
active
052112578
ABSTRACT:
A power transmission apparatus for four-wheel drive vehicle which uses a hydraulic pump to absorb a rotational speed difference caused between front and rear wheels or left side and right side wheels to thereby materialize the four-wheel drive state and which is provided at a fixed housing with a variable throttle for adjusting oil pressure at the hydraulic pump. The variable throttle is adjustable of a degree of its opening by brake oil pressure generated by the braking action during the drive operation of an electromagnetic actuator or oil pressure introduced into a power cylinder disposed in a steering mechanism. Also, outside the fixed housing are provided fins for dissipating the heat content of operating oil at the hydraulic pump. Furthermore, on the slidable contact surface of a casing of the hydraulic pump with the fixed housing is provided sealing means for preventing the operating oil in the hydraulic pump from leaking therefrom.
REFERENCES:
patent: 2679306 (1954-05-01), Hartmann
patent: 3686976 (1972-08-01), Philippi
patent: 3773130 (1973-11-01), Mueller
patent: 3926287 (1975-12-01), Taylor
patent: 4676336 (1987-06-01), Hiramatsu et al.
patent: 4727966 (1988-03-01), Hiramatsu et al.
patent: 4741407 (1988-05-01), Torii et al.
patent: 4850447 (1989-07-01), Hirakushi et al.
patent: 4881626 (1989-11-01), Hiramatsu
patent: 4919248 (1990-04-01), Hiramatsu et al.
patent: 4995491 (1991-02-01), Hiramatsu et al.
patent: 5074825 (1991-12-01), Hamasaki et al.
Hiromi Isogawa
Shuzo Hirakushi
Yoshihiro Nakagawa
Focarino Margaret A.
Hurley Kevin
Koyo Seiko Co. Ltd.
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