US3620406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pull tab and pressure relief valve
Assignee: Raychem Corp
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Filing: 1969-12-29
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Granted: 1971-11-16
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Expires: 1989-12-29
Abstract
Abstract A pull tab for a pressurized container which can be manually removed to release the fluid under pressure and which also operates as a relief valve if the internal pressure in the container exceeds a desired level. The tab is formed in place by placing a piece of heat-recoverable plastic tubing or rod in one or more appropriately sized holes in the container and then expanded by heat to block the hole. The plastic tubing or rod then acts as a valve which relieves the container pressure upon its removal.
Inventors
- 👤 Joseph H Evans
- 👤 Fred Eugene Weir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:24
CPC Classifications
F; F25; F25D; F25D3/00; F25D3/10; F25D3/107; B; B65; B65D; B65D25/00; B65D25/02; B65D51/00; B65D51/16; B65D51/1672; B65D51/1683; B65D81/00; B65D81/32; B65D81/3216; F25D2331/00; F25D2331/80; F25D2331/805
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
54 words
A combined pull tab and pressure relief valve for a container having a surface having at least one hole therein, comprising a plastic member having at least a portion comprising heatrecoverable material, said portion of said plastic member being inserted into said hole and expandably heat-recovered to engage said container and seal said hole.
Claim 2
Dependent Claim
54 words
A combined pull tab and pressure relief valve for a container having a surface having at least one hole therein, comprising a plastic member having at least a portion comprising heatrecoverable material, said portion of said plastic member being inserted into said hole and expandably heat-recovered to engage said container and seal said hole.
Claim 3
Dependent Claim
67 words
A combined pull tab and pressure relief valve for a container having a surface having at least one hole therein, comprising a plastic member having at least a portion comprising heat-recoverable material, said portion of said plastic member being inserted into said hole and expandably heat-recovered to engage said container and seal said hole; said hole in said surface being defined by a conical, outwardly concave surface.
Claim 4
Dependent Claim
67 words
A combined pull tab and pressure relief valve for a container having a surface having at least one hole therein, comprising a plastic member having at least a portion comprising heat-recoverable material, said portion of said plastic member being inserted into said hole and expandably heat-recovered to engage said container and seal said hole; said hole in said surface being defined by a conical, outwardly concave surface.
Claim 5
Dependent Claim
58 words
A combined pull tab and pressure relief valve for a container having a surface having at least one hole therein, comprising a plastic member having at least a portion comprising heat-recoverable material, said portion of said plastic member being inserted into said hole and expandably heat-recovered to engage said container and seal said hole; said member being tubular.
Claim 6
Dependent Claim
58 words
A combined pull tab and pressure relief valve for a container having a surface having at least one hole therein, comprising a plastic member having at least a portion comprising heat-recoverable material, said portion of said plastic member being inserted into said hole and expandably heat-recovered to engage said container and seal said hole; said member being tubular.
Claim 7
Dependent Claim
74 words
A combined pull tab and pressure relief valve for a container having a surface having at least one hole therein, comprising a plastic member having at least a portion comprising heat-recoverable material, said portion of said plastic member being inserted into said hole and expandably heat-recovered to engage said container and seal said hole; said surface being concaved inwardly to allow retraction of said plastic member inside of the outermost plane of said surface.
Claim 8
Dependent Claim
74 words
A combined pull tab and pressure relief valve for a container having a surface having at least one hole therein, comprising a plastic member having at least a portion comprising heat-recoverable material, said portion of said plastic member being inserted into said hole and expandably heat-recovered to engage said container and seal said hole; said surface being concaved inwardly to allow retraction of said plastic member inside of the outermost plane of said surface.
Claim 9
Dependent Claim
18 words
The combined pull tab and pressure relief valve of claim 1 wherein said container is a pressurized can.
Claim 10
Dependent Claim
30 words
The device of claim 1 wherein said surface has two holes and said plastic member has at least two portions comprising heat-recoverable material, said portions being inserted into said holes.
Claim 11
Dependent Claim
89 words
A combined pull tab and pressure relief valve for a pressurized can comprising a surface of said can having two holes formed therein, a generally U-shaped plastic tubular member comprising heat-recoverable material, the ends of said plastic tubular member being inserted into said holes and expandably heat-recovered to engage said surface; said surface being formed around said holes into a cone concaved toward the outside of said can; said surface being concaved inward to allow retraction of said plastic tubular member inside of the outermost plane of said surface.
Claim 12
Dependent Claim
89 words
A combined pull tab and pressure relief valve for a pressurized can comprising a surface of said can having two holes formed therein, a generally U-shaped plastic tubular member comprising heat-recoverable material, the ends of said plastic tubular member being inserted into said holes and expandably heat-recovered to engage said surface; said surface being formed around said holes into a cone concaved toward the outside of said can; said surface being concaved inward to allow retraction of said plastic tubular member inside of the outermost plane of said surface.
References Cited (Backward Citations)
US3229478A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |