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EP0068211A2
Expired / Lapsed
EP
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Pneumatic lumbar support for a seat
Assignee: Nissan Motor Co Ltd
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Filing: 1982-06-09
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Granted: —
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Expires: 2002-06-09
Abstract
Abstract A pneumatic lumbar support for a vehicle seat has a pneumatic cushion (2) therein. The pneumatic cushion (2) is equipped with a board-like member (6) on the front side thereof. The board-like member (6) is sufficiently rigid and flexible to form a moderate curve on a lumbar support portion of the seat back (S).
Inventors
- 👤 Hitoshi Kiyomiya
- 👤 Shinichi Nishimura
- 👤 Kenji Ichikawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 04:51
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/36; A47C7/40; A47C7/46; A47C7/467
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
119 words
A pneumatic lumbar support for a vehicle seat, comprising a cushion pad in a seat back of the vehicle seat, a cover surrounding said cushion pad, a pneumatic cushion expandable and contractable in response to variation of the pneumatic pressure therein, said pneumatic cushion being disposed inside said cushion pad or between said cushion pad and said cover at a portion of the seat back opposing the lumbar vertebra of the occupant, characterized by a board-like member (6) interpositioned at the front facing-side of said pneumatic cushion (2,7,8) and being sufficiently rigid and flexible to be deformed by said pneumatic cushion (2,7,8) when expanded to form a surface with a larger radius of curvature than said pneumatic cushion (2,7,8).
Claim 2
Dependent Claim
119 words
A pneumatic lumbar support for a vehicle seat, comprising a cushion pad in a seat back of the vehicle seat, a cover surrounding said cushion pad, a pneumatic cushion expandable and contractable in response to variation of the pneumatic pressure therein, said pneumatic cushion being disposed inside said cushion pad or between said cushion pad and said cover at a portion of the seat back opposing the lumbar vertebra of the occupant, characterized by a board-like member (6) interpositioned at the front facing-side of said pneumatic cushion (2,7,8) and being sufficiently rigid and flexible to be deformed by said pneumatic cushion (2,7,8) when expanded to form a surface with a larger radius of curvature than said pneumatic cushion (2,7,8).
Claim 3
Dependent Claim
45 words
A pneumatic lumbar support as set forth in claim 1, characterized in that said pneumatic cushion (2) and said board-like mamber (6) are fixedly attached at the position B of said pneumatic cushion (2) which experiences the greatest displacement during variation of the pneumatic pressure.
Claim 4
Dependent Claim
38 words
A pneumatic lumbar support as set forth in claim 1 or 2, characterized in that said pneumatic cushion (7,8) includes some lateral curvature such that said lumbar supporting portion of the seat back S fits the occupant's back.
Claim 5
Dependent Claim
28 words
A pneumatic lumbar support as set forth in claim 3, characterized in that said pneumatic cushion (8) has a plurality of pneumatic chambers (8a-8f) partitioned from each other.
Claim 6
Dependent Claim
47 words
A pneumatic lumbar support as set forth in any of the above claims, wherein said pneumatic cushion (2) is interposed between said cushion pad 1 and said cover 3, characterized in that said board-like member (6) is positioned between said pneumatic cushion (2) and said cover (3).
Claim 7
Dependent Claim
25 words
A pneumatic lumbar support as set forth in any of the above claims, characterized in that said board-like member (6) is formed from a palmboard.
References Cited (Backward Citations)
No citation records indexed.
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