Patent US3940152A successfully refreshed from Google Patents.
US3940152A
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Pneumatic seal
Assignee: Joint Francais SNC
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Filing: 1974-08-01
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Granted: 1976-02-24
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Expires: 1994-08-01
Abstract
Abstract Pneumatic seal consisting of a flattened casing forming a base onto which are folded back symmetrically double thickness of two lateral walls. Such a seal has, in the "rest" position, a cross-section having a very slight height and, in the "inflated" position, a cross-section in height greater than that of known seals. Such a seal is intended to provide sealing between mobile elements belonging to sealed enclosures, for example at the level of the doors of those enclosures.
Inventors
- 👤 Jean Fournier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:25
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/46
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
56 words
In an inflatable and deflatable pneumatic seal consisting of a profiled casing made of an elastic material, the improvement wherein in the deflated condition, the casing comprises a flat base, a top collapsed on said base and at least one double thickness lateral sidewall which is at least folded in and down on the collapsed top.
Claim 2
Dependent Claim
56 words
In an inflatable and deflatable pneumatic seal consisting of a profiled casing made of an elastic material, the improvement wherein in the deflated condition, the casing comprises a flat base, a top collapsed on said base and at least one double thickness lateral sidewall which is at least folded in and down on the collapsed top.
Claim 3
Dependent Claim
23 words
The pneumatic seal according to claim 1, wherein the double thickness of the lateral wall is folded back twice onto said collapsed top.
Claim 4
Dependent Claim
32 words
The pneumatic seal according to claim 1, wherein the width L of the base is greater than 0.785 H, with H being the height of the transversal cross-section of the inflated seal.
Claim 5
Dependent Claim
24 words
The pneunatic seal according to claim 1, wherein the casing has, in deflated condition, two lateral walls folded back symmetrically onto the said base.
Claim 6
Dependent Claim
24 words
The pneumatic seal according to claim 2, wherein the casing has, in deflated condition, two lateral walls folded back symmetrically onto the said base.
Claim 7
Dependent Claim
24 words
The pneumatic seal according to claim 3, wherein the casing has, in deflated condition, two lateral walls folded back symmetrically onto the said base.
Claim 8
Dependent Claim
30 words
The pneumatic seal according to claim 3, wherein the ratio of H/h is greater than 2; with h being the height of the seal transversal cross-section in the deflated condition.
Claim 9
Dependent Claim
30 words
The pneumatic seal according to claim 6, wherein the ratio of H/h is greater than 2, with h being the height of the seal transversal cross-section in the deflated condition.
References Cited (Backward Citations)
US2720011A
Cited
US3262707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |