Adjustable-length columns for chairs, tables or the like

US4969619A · kind A · utility

Assignee

• SUSPA GMBH · DE

Inventors

• Hans J. Bauer · Altdorf, DE
• Hans-Peter Bauer · Altdorf, DE

Key dates

• Filing date: Oct 5, 1989
• Grant date: Nov 13, 1990
• Expiry date: Oct 5, 2009

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F9/38
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An adjustable-length column for chairs, tables or the like has an upright tube and a gas spring disposed in it. The piston rod of the gas spring is supported against a bottom plate of the upright tube. To assure support of the bottom plate in the face of extremely strong forces in the axial direction of the column at little manufacturing expense, the rim of the upright tube is bent inward approximately semicircularly in cross section. The bottom plate is supported on the end face of this rim.