Patent ID: 8840094

Claim:
A self-pumping suspension strut with internal level regulation, the suspension strut comprising: a fluid-filled working cylinder ( 19 ) being pressurized with a pressure of fluid acting as a spring; the fluid-filled working cylinder ( 19 ) having a working space ( 3 , 31 ) in which a hollow piston rod ( 1 ) being guided in a sealed manner; a pump piston ( 4 , 6 ), attached to the working cylinder ( 19 ), projecting into the hollow piston rod ( 1 ) so that, during relative movement between the working cylinder ( 19 ) and the piston rod ( 1 ), delivering fluid from the working space ( 3 , 31 ) into a pressure chamber ( 13 ) having a pressure higher than a pressure of the working space ( 3 , 31 ), the self-pumping suspension strut comprising axially and circumferentially spaced flow connections ( 5 , 17 , 18 , 32 ), between the pressure chamber ( 13 ) and the working space ( 3 , 31 ), for the selective setting of a specifiable dynamic level determined by an extension length of the piston rod ( 1 ); and the piston rod ( 1 ) being rotated, by a rotation device ( 33 ), for selective cooperation of the flow connections ( 5 , 17 , 18 , 32 ).