Device for controlling a gear box of a vehicle, particularly an

Details Device for controlling a gear box of a vehicle, particularly an Device for controlling a gear box of a vehicle, particularly an

1990-11-15

1992-09-01

Wright, Dirk

Machine element or mechanism

Gearing

Interchangeably locked

74473R, 91368, 91466, B60K 2010

Patent

active

051429276

ABSTRACT:
The device comprises a lever movable by the operator between at least two working positions and a neutral position to achieve, by means of an hydraulic actuator of double acting follower type, of the gear ratios in one stage of the gear box. The actuator comprises a piston slidable between two working positions and one neutral position to actuate engagement means and defining two chambers; and a shaft connected to the lever by means of a motion transfer unit and shaped as an hydraulic distributor in such a way that in the neutral position of the lever the chambers are connected to a discharge opening so as to determine the neutral position of the piston, and in a manner and in an operative position the stroke of the shaft causes communication of one chamber with the opening and of the other with an inlet opening for a fluid under pressure such that the pressure will translate the piston in the same direction and with the same stroke as the shaft. (FIG. 4).

REFERENCES:
patent: 3253613 (1966-05-01), Richolt
patent: 3422939 (1969-01-01), Henry-Biabaud
patent: 3913449 (1975-10-01), Koch et al.
patent: 4149428 (1979-04-01), Mueller
patent: 4191202 (1980-03-01), Brent
patent: 4445393 (1984-05-01), Braun
patent: 4748863 (1988-06-01), McNinch, Jr.
patent: 5012725 (1991-05-01), Leary

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