Patent ID: 7021434
Filing Date: 2006-04-04
Classification: B60G,Y10S

Abstract:
1. A self-pumping hydropneumatic suspension strut with internal height control for motor vehicles, comprising: an outer tube; a high pressure chamber containing a gas cushion located in a high-pressure gas chamber; a dividing piston contacting the high pressure gas chamber with the gas cushion and moveable within the outer tube; an intermediate wall secured axially to the outer tube; a work cylinder filled with damping medium and under pressure by the gas cushion via the dividing piston and via a connection opening located in the intermediate wall; a work piston dividing the work cylinder into a first work space and a second work space; a hollow piston rod supporting the work piston; a hollow pump rod located within the hollow piston rod for conveying the damping medium out of a low-pressure chamber via a flow connection, wherein the flow connection is arranged within the intermediate wall in order to maintain a low overall height of the intermediate wall and not to protrude from the intermediate wall toward the dividing piston, the flow connection opening out below a surface of the damping medium in the low-pressure chamber, and the flow connection comprising a radially extending bore and an axially extending bore connected to the radially extending bore, and wherein the radially extending bore terminates in an annular recess extending at least partially around a circumferential surface of the intermediate wall.