A - Human Necessities – 47 – C
Patent
A - Human Necessities
47
C
A47C 4/54 (2006.01) A47C 7/46 (2006.01) B60N 2/44 (2006.01) B60N 2/66 (2006.01)
Patent
CA 2262961
An adjustable lumbar support system for a vehicle seat (10) includes an inflatable air cell (18), or cells coupled by an air line (140) to a motorized diaphragm pump (22). The outlet valve (76) of the pump is in the form of an umbrella valve (80) which serves not only to seal the pump on the intake strokes, but is of such character to provide the sole seal between the air cell and pump, thereby eliminating the need to have a separate external check valve between the pump and air cell to assure that the air cell does not leak once pressurized.
L'invention concerne un système de support des lombaires réglable pour siège de véhicule (10), lequel système comprend une cellule pneumatique (18) gonflable, ou des cellules couplées via une conduite d'air (140) à une pompe (22) à membrane motorisée. Le clapet de sortie (76) de la pompe se présente sous la forme d'un clapet "parapluie" (80), qui sert non seulement à fermer hermétiquement la pompe lors de la course d'admission, mais aussi, étant donné sa configuration, à constituer le seul joint hermétique entre la cellule pneumatique et la pompe, ce qui évite d'avoir un clapet anti-retour externe séparé entre la pompe et la cellule pneumatique pour éviter les fuites de la cellule pneumatique une fois pressurisée.
Macrae & Co.
Mccord Winn Textron Inc.
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