Patent ID: 9261117
Filing Date: 2016-02-16
CPC Classification: B60Y,F15B,F16H

Claim Text:
1. A pneumatic shifting force supporting device for a gearbox comprising: a. a housing structure ( b. a control rod ( c. an output unit ( d. a working piston ( wherein, there is a valve arrangement ( 23 ) between the control rod and the output unit, fluidically located between the compressed air inlet and the pneumatic working chambers, wherein by means of an appropriate pre-tension of the two pneumatic working chambers, this arrangement causes a pneumatic sequence of the output unit to the control rod and the arrangement includes two valve pistons ( 20 , 21 ) tightly guided in a slidable manner at the output unit, coupled with the control rod, and two annular sealing edges ( 43 ), coupled with the control rod, each cooperating with a valve spool ( 30 , 31 ) that is longitudinally guided relative to the control rod as well as to the output unit, and wherein each of the two valve spools hereby cooperate with a valve seat ( 26 , 27 ) associated with the output unit, and a slidable throttle slide ( 51 ) is associated with at least one, preferably both, valve pistons, and wherein the throttle slide has a closing edge ( 58 ) which cooperates with the respective, associated valve seat, and delimits at least one throttle passage ( 49 ), the cross-sectional area of which depends on the relative position of the throttle slide with respect to the associated valve piston.