Elastic column of adjustable length

Details Elastic column of adjustable length Elastic column of adjustable length

1976-06-21

1978-06-27

Maslousky, Paul E.

Motors: expansible chamber type

Differential

Opposing pressure applied by bypassing

91165, 91417R, 92 84, 92134, F15B 1517, F16J 110

Patent

active

040967859

ABSTRACT:
A column including a cylinder, a piston axially slidable in the cylinder cavity, a piston rod axially projecting from the cylinder, and a valve permitting selective communication between the two compartments of the cylinder cavity separated by the piston for flow of fluid between the compartments is additionally provided with a helical compression spring coiled about the piston rod and impeding axial movement of the piston on the piston rod in one direction, movement in the other direction being limited by a radial abutment flange on the piston rod. The spring favorably affects the comfort of a chair whose seat is mounted on the column.

REFERENCES:
patent: 2875732 (1959-03-01), Hoffmann
patent: 3210941 (1965-10-01), Stelzer
patent: 3450005 (1969-06-01), Ellis
patent: 3606983 (1971-09-01), Mitchell
patent: 3628422 (1971-12-01), Acre
patent: 3754450 (1973-08-01), Putt et al.
patent: 3828651 (1974-08-01), Dorner

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