Height adjustable work chair having a non-swivel seat

US6116690A · kind A · utility

Inventor

• John E. Larson · Hamilton, US

Key dates

• Filing date: Sep 8, 1997
• Grant date: Sep 12, 2000
• Expiry date: Sep 8, 2017

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A47C3/30
• WIPO field: Furniture, games
• WIPO sector: Other fields

Abstract

A non-swiveling height adjustable work chair comprises a seat, a base, and a non-swiveling height adjustment column disposed intermediate the base and the seat. The height adjustment column comprises at least two telescoping height adjustment mechanisms, wherein the telescoping height adjustment mechanisms secure the seat against rotation in relation to the chair base. The chair additionally comprises a lever to actuate the height adjustment mechanisms. The height adjustment column may typically comprise a single stand tube having a first and a second end, wherein the first end is attached to the chair base and extends vertically therefrom, and the second end includes at least two holes through which the telescoping height adjustment mechanisms pass. Or, the height adjustment column may comprise at least two stand tubes each having a first and a second end, wherein the first end is attached to the chair base and extends vertically therefrom, and wherein the second end includes a hole through which the telescoping height adjustment mechanism passes. Each telescoping height adjustment mechanism utilized in the work chair typically comprises a gas spring. The gas springs comprise a cy…