A gas spring having a cylinder, a piston within the cylinder and a piston rod projecting out of the cylinder. A seal between the rod and cylinder is formed by a cup-shaped member presenting an inwardly-projecting skirt that functions as a one-way check valve. A second or inner seal may be optionally placed within the cup-shaped member to form a lubricant-retaining chamber.
申请公布号
US5011121(A)
申请公布日期
1991.04.30
申请号
US19870038829
申请日期
1987.04.15
申请人
EAGLE-PICHER INDUSTRIES, INC.
发明人
ORIOLA, RALPH;ROMINE, CHARLES F.;MEISNER, EDWARD O.