EP0058951A1
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EP
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Pneumatic cushion and manufacturing method therefor
Assignee: Nissan Motor Co Ltd
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Filing: 1982-02-18
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Granted: —
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Expires: 2002-02-18
Abstract
Abstract A pneumatic cushion is fabricated from two sheets (32, 34) of expandable thin material which are welded together at a circumferential portion thereof to define therebetween an expandable pneumatic chamber (38). The welded portion (36) is separated from the pneumatic chamber (38) by a substantially rigid board-like member (48). The board-like member (48) cooperates with a portion of the sheets mating therewith for isolating the welded portion (36) from tension forces applied to the pneumatic chamber (38) as the air pressure in this chamber is increased.
Inventors
- 👤 Hiroshi Nagatake
- 👤 Keiji Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 12:31
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/36; A47C7/40; A47C7/46; A47C7/467; A47C4/00; A47C4/54; Y; Y10; Y10S; Y10S297/00; Y10S297/03; Y10S5/00; Y10S5/932; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/103; Y10T428/00; Y10T428/19; Y10T428/192
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
57 words
A pneumatic cushion comprising an expandable air-tight bag like member defining a pneumatic chamber, said member including an air tight welded portion extending along the circumference of said chamber, characterized by means (48;48') for isolating said welded portion from tension forces applied to said bag like member (32,34;90) resulting from pneumatic pressure in said pneumatic chamber (38;38').
Claim 2
Dependent Claim
57 words
A pneumatic cushion comprising an expandable air-tight bag like member defining a pneumatic chamber, said member including an air tight welded portion extending along the circumference of said chamber, characterized by means (48;48') for isolating said welded portion from tension forces applied to said bag like member (32,34;90) resulting from pneumatic pressure in said pneumatic chamber (38;38').
Claim 3
Dependent Claim
39 words
A pneumatic cushion as set forth in claim 1, characterized in that said bag like member comprises a first and a second expandable sheet (32,34), the sheets being secured to each other along said air tight welded portion (36).
Claim 4
Dependent Claim
36 words
A pneumatic cushion as set forth in claim 1, characterized in that said bag like member comprises a single expandable sheet (90) folded to form first and second sections (94,96) at least partially overlying one another.
Claim 5
Dependent Claim
58 words
A pneumatic chamber as set forth in claim 1, 2 or 3, characterized in that iaid isolating means comprises a substantially rigid board (48;48') and means (e.g. 50,52,56,58) for holding said welded portion (36;36') behind the rigid board (48;48') on one side thereof, the other side of said rigid board (48;48') being positioned adjacent said pneumatic chamber (38;38').
Claim 6
Dependent Claim
63 words
A pneumatic cushion as set forth in claim 4, characterized in that said holding means comprises at least one strip (50;62;70;50') attached to said bag like member (32,34;90) and overlapping at least part of said welded portion (36;36'), said strip (50;...) being secured at an end thereof to a portion of said bag like member (32,34;90) remote from said overlapped welded portion (36;36').
Claim 7
Dependent Claim
82 words
A pneumatic cushion as set forth in claim 5, characterized in that said holding means comprises a first and a second strip (50,52;62,64;70,74; 50',98) extending from parallel edges of said bag like member (32,34;90) and welded at mating end portions (54;66;54') thereof on said one side of said board (48; 48'), and a third strip (56;68;76;56') extending from a lateral edge with respect to said parallel edges, said first, second and third strips overlapping at least part of said welded portion (36,36').
Claim 8
Dependent Claim
46 words
A pneumatic cushion as set forth in claims 2 and 5, characterized in that said strip (52;...) is an extension of one of said first and second sheets (32,34), the free end of said extension being secured to one of said first and second sheets (32,34).
Claim 9
Dependent Claim
47 words
A pneumatic cushion as set forth in claims 2 and 6, characterized in that said first and second strips (50,52;62,64) extend from one of said first and second sheets (32,34) and that said third strip (56;68) extends from the other of said first and second sheets (32,34).
Claim 10
Dependent Claim
128 words
A pneumatic cushion as set forth in claims'.2 and 5, characterized in that said holding means includes a first strip (70) extending from one of said first and second sheets (34) along one edge thereof and a second strip (74) extending from the other of said first and second sheets (32) along the opposite side edge with respect to said one edge, and a third strip (76) placed over said first and second strips (70,74), which third strip (76) extends from one of said first-and second sheets (32,34) along the edge extending lateral to said one edge, said first, second and third sections overlapping at least parts of said welded portion and being secured to one of said first and second sheets (32,34) with their respective free ends.
Claim 11
Dependent Claim
51 words
A pneumatic cushion as set forth in any of the claims 2,7,8 or 9, characterized in that one of said first and second sheets (34) is provided with at least one port (40,42) for communicating with a pneumatic pressure source and for adjustment of pneumatic pressure in the pneumatic chamber (38;38').
Claim 12
Dependent Claim
30 words
A pneumatic cushion as set forth in any of the claims 7 to 10, characterized in that said strips (50,...) are integral with the respective one of the sheets (32,34).
Claim 13
Dependent Claim
36 words
A pneumatic cushion as set forth in any of the above claims, characterized in that said bag like member (32,34;90) is made of a thermoplastic synthetic resin, such as vinyl chloride resin, polyesthylen, nylon or polyester.
Claim 14
Independent Claim
114 words
A method for manufacturing a pneumatic cushion, wherein first and second sheets are cut from a thermoplastic expandable thin sheet blank and wherein an expandable pneumatic chamber is formed by welding said first and second sheets in gas-tight fashion, thereby forming a welded seam, characterized by the steps of placing one side of a substantially rigid board (48) adjacent a surface of said second sheet (34) at a location opposite to said pneumatic chamber (38), turning the welded seam (36) so that the welded seam (36) is located on the other side of said rigid board (48) opposite to said pneumatic chamber (38), and securing said turned weld seam behind the rigid board (48).
Claim 15
Independent Claim
114 words
A method for manufacturing a pneumatic cushion, wherein first and second sheets are cut from a thermoplastic expandable thin sheet blank and wherein an expandable pneumatic chamber is formed by welding said first and second sheets in gas-tight fashion, thereby forming a welded seam, characterized by the steps of placing one side of a substantially rigid board (48) adjacent a surface of said second sheet (34) at a location opposite to said pneumatic chamber (38), turning the welded seam (36) so that the welded seam (36) is located on the other side of said rigid board (48) opposite to said pneumatic chamber (38), and securing said turned weld seam behind the rigid board (48).
Claim 16
Dependent Claim
31 words
A method as set forth in claim 13, characterized by the additional step of providing an air inlet and outlet port (40,42) for one of said first and second sheets (32,34).
Claim 17
Dependent Claim
53 words
A method as set forth in claim 13 or 14, characterized in that said securing step includes overlapping a holding member (e.g. 50) formed integrally with at least one of said first and second sheets (32, 34) around said rigid board (48) and over at least a part of said welded seam (36).
References Cited (Backward Citations)
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