Adaptive pneumatic seat cushion and backrest cushion for...

B - Operations – Transporting – 60 – N

Patent

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Details

B60N 2/44 (2006.01) A47C 4/54 (2006.01) A47C 7/46 (2006.01)

Patent

CA 2489012

The invention relates to an adaptive seat and backrest cushion, divided into a seat cushion (1) and a backrest cushion (2) of essentially the same construction. A number of webs (6, 7) are introduced between an upper skin (4) and a lower skin (5) of an airtight shell (3) by welding or gluing. The first webs (6) are of simple construction, the second webs (7) are of double construction each with a cavity (10) between the webs (7). The space within the shell (3) is filled with compressed air at a pressure p1, the cavities (10) can be pressurised as required with compressed air at a pressure of p2, where p2 > p1. The thickness as well as the softness of the seat or backrest cushion (1, 2) can thus be altered. As a result of the number and arrangement of the doubled webs (7) and the possible combination thereof in groups the cushions (1, 2) can be matched to the instantaneous comfort requirements by selective pressurisation with the compressed air p2 by the seated person.

L'invention concerne un coussin d'assise et de dossier adaptatif divisé en un coussin d'assise (1) et un coussin de dossier (2) conçus de façon semblable. Une pluralité d'entretoises (6, 7) est insérée par soudage ou collage entre une pellicule supérieure (4) et une pellicule inférieure (5) d'une enveloppe étanche à l'air (3). Les premières entretoises (6) sont conçues de façon simple, et les deuxièmes entretoises (7) sont conçues de façon double avec un espace creux (10) entre les entretoises (7). L'espace contenu dans l'enveloppe (3) est rempli d'air comprimé à une pression p¿1?, les espaces creux (10) peuvent recevoir, si nécessaire, de l'air comprimé à une pression p¿2?, avec p¿2? > p¿1?. Ainsi, il est possible de régler l'épaisseur et la dureté du coussin d'assise ou de dossier (1, 2). Le nombre et la position des entretoises doubles (7) et leur éventuelle disposition en groupes permettent d'adapter les coussins (1, 2) aux exigences de confort momentanées de l'utilisateur par application ciblée d'air comprimé p¿2?.

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