Patent · US Expired

Seating-system for folding wheelchairs

US4732426A · kind A · utility

3Cited by

4References

11Claims

0Family size

Assignee

Ortopedia GmbH · DE

Inventors

Uwe Brudermann · Hagen, DE
Ruth Kruse · Laboe, DE
Peter Mackert · Bellin, DE

Key dates

Filing date	Nov 7, 1985
Grant date	Mar 22, 1988
Priority date	—
Expiry date	Nov 7, 2005

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S297/04
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

The present invention relates to a seat structure for collapsible (foldable) invalid chairs provided with a flexible seat and/or back covering, comprising an upholstery material (3) and a covering material (4) at least partially enclosing said upholstery material. The covering material (4) is provided with ultrafine perforations, and an open-pore foam material shaped as a molded part is used for the upholstery material.

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