Seating-system for folding wheelchairs
AssigneeOrtopedia GmbH
InventorsUwe Brudermann, Ruth Kruse, Peter Mackert
Life of this patent
Estimating the term…
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.
Claims11
A seat structure comprising a portion useful as a seat portion, a back portion, or both for collapsible invalid chairs having flexible seat or back coverings of an upholstery material (3) and a covering material (4) at least partially enclosing the upholstery material, characterized in that the upholstery material (3) comprises a spring-back resilient and steam permeable material and is shaped as a molded part providing for favorable seating pressure distribution;
- that the covering material (4) is provided with ultrafine perforations (7) rendering the covering material permeable to steam;
- that the seat structure allows for the collapsibility of the collapsible invalid chair owing to the flexibility of the materials used and the configuration of the molded part;
- that the development of the surface of the molded part for seat, back, or both portions corresponds approximately to the conventional blank of seat or back coverings of collapsible invalid chairs provided with a flexible seat, back, or both covering, and that the molded parts, in their unloaded state, are shaped to be convex in the direction of the load.
A seat structure comprising a portion useful as a seat portion, a back portion, or both for collapsible invalid chairs having flexible seat or back coverings of an upholstery material (3) and a covering material (4) at least partially enclosing the upholstery material, characterized in that the upholstery material (3) comprises a spring-back resilient and steam permeable material and is shaped as a molded part providing for favorable seating pressure distribution;
- that the covering material (4) is provided with ultrafine perforations (7) rendering the covering material permeable to steam;
- that the seat structure allows for the collapsibility of the collapsible invalid chair owing to the flexibility of the materials used and the configuration of the molded part;
- that the development of the surface of the molded part for seat, back, or both portions corresponds approximately to the conventional blank of seat or back coverings of collapsible invalid chairs provided with a flexible seat, back, or both covering, and the front edge and the rear edge of the seat portion (2) run inwardly in a concave form from the lateral edges of the seat portion (2) when seen in plan view.
Dependencies are inferred from the claim text.