Patent ID: 7163078

Claim:
Hydrostatic drive having at least one hydraulic pump ( 1 ) and a first and a second hydraulic motor ( 6 , 25 ), 5 which are each connected by two working lines ( 4 , 4 ′, 5 , 5 ′) to the hydraulic pump ( 1 ) and the absorption volume of which is adjustable in each case by means of an adjusting device ( 40 , 41 ), wherein in each case one hydraulic motor ( 6 , 25 ) is provided for a drive train for in each case a right or a left vehicle side, characterized in that the adjusting devices ( 40 , 41 ) are actuable in each case by means of an adjusting piston ( 7 , 26 ), wherein the adjusting pistons ( 7 , 26 ) of both hydraulic motors ( 6 , 25 ) are loadable with a force by means of a common high pressure and the common high pressure is equal to the highest working pressure prevailing in the working lines ( 4 , 4 ′, 5 , 5 ′) of both hydraulic motors ( 6 , 25 ), and the force is counteracted in each case by a counterforce, which is generated by an actuating pressure in an actuating pressure chamber ( 11 , 11 ′), and that the actuating pressure chamber ( 11 ) of the first adjusting piston ( 7 ) of the first hydraulic motor ( 6 ) is relievable through a first pressure regulating valve ( 17 ) towards a tank ( 20 ) and the first pressure regulating valve ( 17 ) is loaded with the in each case higher pressure of the working lines ( 4 , 5 ) associated with the first hydraulic motor ( 6 ) as a controlled variable and the actuating pressure chamber ( 11 ′) of the second adjusting piston ( 27 ) of the second hydraulic motor ( 25 ) is relievable through a second pressure regulating valve ( 30 ) towards the tank ( 20 ) and the second pressure regulating valve ( 30 ) is loaded with the in each case higher pressure of the working lines ( 4 ′, 5 ′) associated with the second hydraulic motor ( 25 ) as a controlled variable, and wherein the pressure regulating valves ( 17 , 30 ) in their initial position establish a connection, through which flow is possible in both directions, of in each case one control pressure valve ( 19 , 29 ) to in each case on actuating pressure chamber ( 11 , 11 ′).