Patent · US Expired

Backrest

US7147288B2 · kind B2 · utility

6Cited by

6References

5Claims

0Family size

Assignee

SEDUS STOLL AG · DE

Inventors

Klaus-Peter Grasse · Waldshut-Tiengen, DE
Manfred Schlegel · Küssaberg-Reckingen, DE
Mathias Seiler · Soest, DE

Key dates

Filing date	Jan 20, 2004
Grant date	Dec 12, 2006
Priority date	—
Expiry date	Dec 26, 2024

Classification

Technology area (CPC A)Human Necessities
CPC primaryA47C7/38
WIPO fieldFurniture, games
WIPO sectorOther fields

Abstract

The backrest of a chair comprises a frame, a backrest support and a neck support. A membrane is clipped into the frame, and the backrest support is articulated on a tilting mechanism. The frame comprises two side parts and two cross-pieces, the lower cross-piece lying at the height of the user's lumbar vertebra. The frame and the backrest support are interconnected in one piece. The component created as a result is advantageously a plastic injection molding produced by the gas injection technique (GIT) and the plastic is a glass-fiber-reinforced polyarylamide. This overall structure of the backrest provides a high level of sitting comfort by elastic support of the back in all major regions and directions of movement, but at the same time also considerably reduces production, transport and assembly complexity and has an aesthetically impressive, distinctive form.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.