Column unit

Details Column unit Column unit

2005-11-15

2005-11-15

Butler, Douglas C. (Department: 3683)

Spring devices

Vehicle

Comprising compressible fluid

C016S066000, C016S084000, C267S131000, C248S631000

Reexamination Certificate

active

06964411

ABSTRACT:
A column unit includes a fixed upright tube with a bottom upright-tube end and a top upright-tube end and a telescopic tube axially displaceably guided in the upright tube. A cylinder of a pneumatic spring is axially displaceably guided in the telescopic tube. A piston rod projecting out of the cylinder of the pneumatic spring has a free end fastened on the upright tube proximate the bottom upright-tube end. A carry-along stop of the cylinder of the pneumatic spring allows the telescopic tube to be carried along out of the upright tube when the pneumatic spring is moved axially. A securing element limits an axial movement of the telescopic tube out of the upright tube. The securing element is arranged on the upright tube and abuts the outer cylindrical lateral surface of the telescopic tube with radially inwardly directed resilient prestressing. A latching recess on the outer cylindrical lateral surface of the telescopic tube engages the securing element to latch into said latching recess when the telescopic tube has been moved out of the upright tube to a maximally withdrawn position.

REFERENCES:
patent: 4871138 (1989-10-01), Sauter
patent: 5188345 (1993-02-01), Siegner et al.
patent: 5497966 (1996-03-01), Fuhrmann
patent: 6125521 (2000-10-01), Stumpf
patent: 621149 (1934-03-01), None
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patent: 199 19 230 (2000-11-01), None
patent: 10302984 (2004-05-01), None
patent: 10302984 (2004-05-01), None
patent: 0 566 045 (1993-10-01), None
patent: 1440633 (2004-08-01), None
STIC provided translation of German 621149.
STIC provided translation of DE19919230.

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