US4610370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure release vent
Assignee: BP Corp North America Inc
•
Filing: 1985-12-30
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Granted: 1986-09-09
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Expires: 2005-12-30
Abstract
Abstract A pressure release vent for a container which comprises an indentation in a wall of the container which is interrupted by a scored hollow rib having an apex which connects the opposing sidewalls of the indentation at a distance above the bottom of the indentation which is equal to about 5% to about 75% of the depth of the indentation.
Inventors
- 👤 Gregory A. Patterson
- 👤 Melvin S. Good
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:01
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/14; B65D83/70; F; F17; F17C; F17C13/00; F17C13/06; F16; F16K; F16K17/00; F16K17/40; H; H01; H01M; H01M50/00; H01M50/30; H01M50/342; H01M50/3425; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
90 words
A pressure release vent for a container comprising a container wall having an indentation which is interrupted by at least one hollow rib with the apex of said rib connecting the opposing sidewalls of said indentation at a distance above the bottom of said indentation which is equal to about 5% to about 75% of the depth of said indentation and said hollow rib having a score line traversely across it, whereby excessive pressure in the container will tear the container wall at said score line and vent said container.
Claim 2
Dependent Claim
90 words
A pressure release vent for a container comprising a container wall having an indentation which is interrupted by at least one hollow rib with the apex of said rib connecting the opposing sidewalls of said indentation at a distance above the bottom of said indentation which is equal to about 5% to about 75% of the depth of said indentation and said hollow rib having a score line traversely across it, whereby excessive pressure in the container will tear the container wall at said score line and vent said container.
Claim 3
Dependent Claim
18 words
A pressure release vent as set forth in claim 1 wherein said indentation is substantially annular in shape.
Claim 4
Dependent Claim
20 words
A pressure release vent as set forth in claim 1 wherein said hollow rib has a substantially V-shaped cross section.
Claim 5
Dependent Claim
91 words
A pressure release vent for a container comprising a container wall having an annular hollow indentation projecting toward the interior of said container which is interrupted by: (a) a hollow bridge spanning the opposed sidewalls of the indentation; and (b) a hollow rib with the apex of said rib connecting the opposing sidewalls of said indentation at a distance above the bottom of said indentation which is equal to about 5% to about 75% of the depth of said indentation and said hollow rib having a score line traversely across it.
Claim 6
Dependent Claim
91 words
A pressure release vent for a container comprising a container wall having an annular hollow indentation projecting toward the interior of said container which is interrupted by: (a) a hollow bridge spanning the opposed sidewalls of the indentation; and (b) a hollow rib with the apex of said rib connecting the opposing sidewalls of said indentation at a distance above the bottom of said indentation which is equal to about 5% to about 75% of the depth of said indentation and said hollow rib having a score line traversely across it.
Claim 7
Dependent Claim
21 words
A pressure release vent as set forth in claim 4 wherein the cross section of said annular indentation is approximately V-shaped.
Claim 8
Dependent Claim
31 words
A pressure release vent as set forth in claim 4 wherein the depth of said annular indentation is from about 2 to about 10 times the thickness of the container wall.
Claim 9
Dependent Claim
24 words
A pressure release vent as set forth in claim 4 wherein the depth of said annular indentation is approximately equal to its maximum width.
Claim 10
Dependent Claim
37 words
A pressure release vent as set forth in claim 4 wherein said bridge is located at an angle of about 180° with respect to said rib based on the circle which is defined by said annular indentation.
Claim 11
Dependent Claim
40 words
A pressure release vent as set forth in claim 4 wherein said bridge has a width which subtends an arc in the range from about 20° to about 45° based on the circle which is defined by said annular indentation.
Claim 12
Dependent Claim
31 words
A pressure release vent as set forth in claim 4 where the apex of said bridge is substantially in line with the container wall on both sides of said annular indentation.
Claim 13
Dependent Claim
32 words
A pressure release vent as set forth in claim 4 where the centerline of said rib lies approximately on a radial line of the circle which is defined by said annular indentation.
Claim 14
Dependent Claim
21 words
A pressure release vent as set forth in claim 4 wherein the cross section of said hollow rib is approximately V-shaped.
Claim 15
Dependent Claim
41 words
A pressure release vent as set forth in claim 4 wherein said hollow rib has a width which subtends an arc in the range from about 7° to about 15° based on the circle which is defined by said annular indentation.
Claim 16
Dependent Claim
48 words
A pressure release vent as set forth in claim 4 wherein the apex of said hollow rib connects the opposing sidewalls of said indentation at a distance above the bottom of said indentation which is equal to about 40% to about 60% of the depth of said indentation.
Claim 17
Dependent Claim
30 words
A pressure release vent as set forth in claim 4 wherein said score line is approximately tangent to the circle which is defined by the center of said annular indentation.
Claim 18
Dependent Claim
24 words
A pressure release vent as set forth in claim 4 wherein said score line is formed in the exterior surface of said container wall.
Claim 19
Dependent Claim
28 words
A pressure release vent as set forth in claim 4 wherein the residual container wall under said score line is at least about one-fourth the original wall thickness.
Claim 20
Dependent Claim
25 words
A pressure release vent as set forth in claim 4 wherein said annular indentation circumscribes a circular depression projecting toward the interior of the container.
Claim 21
Dependent Claim
37 words
A pressure release vent as set forth in claim 18 wherein said circular depression has a diameter which is equal to about one-fifth to about five-eighths that of the circle which is defined by said annular indentation.
Claim 22
Dependent Claim
26 words
A pressure release vent as set forth in claim 4 wherein said container is for a lithium battery which comprises sulfur dioxide as an electrolyte component.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-08 | 1990-03-10 | 1990-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-08 | 1994-03-10 | 1994-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-08 | 1998-03-10 | 1998-09-09 | $7700.00 | Window Closed / Lapsed |