Patent US4698115A successfully refreshed from Google Patents.
US4698115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicone rubber vacuum bag tool and method of fabricating same
Assignee: Boeing Co
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Filing: 1984-09-28
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Granted: 1987-10-06
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Expires: 2004-09-28
Abstract
Abstract A vacuum bag tool utilizing a silicone rubber sheet as the bag. The silicone rubber sheet has four edges and a strip of silicone elastomer material adhered by curing to a surface of the sheet along each edge. On each strip of silicone elastomer material a further strip of adhesive tape is adhered. With this adhesive tape, the bag is adhered to the base plate of the tool. Thereafter, a vacuum can be established within the bag adhered to the base plate. The tool can thus be used for applying pressure to a layup of composite material place on the base plate and within the bag.
Inventors
- 👤 John J. Dodds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:55
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/32; B29C43/36; B29C43/3642; B29C2043/3644; B29C33/00; B29C33/0038; B29K; B29K2105/00; B29K2105/06; B29K2105/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
93 words
A tool for use in applying pressure to a layup of composite material, comprising: a base plate; a silicone rubber bag in the form of a sheet having four edges, each edge having on the surface of said sheet facing the base plate a strip of silicone elastomer material adhered thereto and a further strip of adhesive tape adhered to the strip of silicone elastomer material, said strips of adhesive tape adhering the sheet to the base plate; and means for establishing a vacuum within the bag when adhered to the base plate.
Claim 2
Dependent Claim
93 words
A tool for use in applying pressure to a layup of composite material, comprising: a base plate; a silicone rubber bag in the form of a sheet having four edges, each edge having on the surface of said sheet facing the base plate a strip of silicone elastomer material adhered thereto and a further strip of adhesive tape adhered to the strip of silicone elastomer material, said strips of adhesive tape adhering the sheet to the base plate; and means for establishing a vacuum within the bag when adhered to the base plate.
Claim 3
Dependent Claim
42 words
The tool as defined in claim 1, wherein the silicone elastomer material includes the following physical properties: ______________________________________
Tensile (PSI) 1000
Hardness (Shore A) 65
Elongation % 300
Modulas at 100% Elongation (PSI)
350
Die C Tear 120
Sp. Gravity 1.14
______________________________________
References Cited (Backward Citations)
US3666600A
Cited
US4078962A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-05 | 1991-04-06 | 1991-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-05 | 1995-04-06 | 1995-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-05 | 1999-04-06 | 1999-10-06 | $7700.00 | Window Closed / Lapsed |