US3822807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closeable containers having means for suppressing fire and/or explosions
Assignee: UK Secretary of State for Defence
•
Filing: 1972-03-13
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Granted: 1974-07-09
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Expires: 1992-03-13
Abstract
Abstract A closeable container having therein a plurality of foam balls having a porosity of 15-25 pores per linear inch, which balls together with the void spaces therein occupy the space within the container to an extent that there is left externally of the balls and within the container a volume equivalent to more than 50 per cent of the total interior space within the container, so that in the event of a fire within the container an unacceptable pressure rise therein may be prevented.
Inventors
- 👤 J Macdonald
- 👤 H Wyeth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:00
CPC Classifications
B; B65; B65D; B65D90/00; B65D90/22; B65D90/38; B65D90/40
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
93 words
A closeable container defining an interior space for contents, closure means for closing the container, and a plurality of balls of openly reticulated plastics foam within the container which together with the void spaces within the pieces occupy the space within the container to an extent that there is left externally of the balls and within the container a volume equivalent to from more than 50 percent up to about 70 percent of the total interior space within the container, and the balls having a porosity of about 15-25 pores per linear inch.
Claim 2
Dependent Claim
93 words
A closeable container defining an interior space for contents, closure means for closing the container, and a plurality of balls of openly reticulated plastics foam within the container which together with the void spaces within the pieces occupy the space within the container to an extent that there is left externally of the balls and within the container a volume equivalent to from more than 50 percent up to about 70 percent of the total interior space within the container, and the balls having a porosity of about 15-25 pores per linear inch.
Claim 3
Dependent Claim
26 words
A container as claimed in claim 1 and wherein at least some of the balls are hollow and comprise a foam layer surrounding a hollow interior.
Claim 4
Dependent Claim
32 words
A container as claimed in claim 1 and wherein the hollow balls are 1- 6 inches in diameter and comprise a foam layer 1/2 -1 inch thick and surrounding a hollow interior.
Claim 5
Dependent Claim
27 words
A container as claimed in claim 1 and wherein the foam has a density of about 12-15 Kg/m3 and is at least 95 percent voids by volume.
Claim 6
Dependent Claim
16 words
A container as claimed in claim 1 and wherein the foam is a polyurethane ester foam.
Claim 7
Dependent Claim
27 words
A container as claimed in claim 1 and having therein net means retaining some at least of said balls in a normally upper part of the container.
Claim 8
Dependent Claim
24 words
A container as claimed in claim 1 and having a layer of openly reticulated plastics foam covering at least part of its exterior surface.
Claim 9
Dependent Claim
21 words
A container as claimed in cLaim 7 and wherein the foam layer has a porosity of 70-100 pores per linear inch.
Claim 10
Dependent Claim
16 words
A container as claimed in claim 7 and wherein the foam layer comprises polyurethane ester foam.
References Cited (Backward Citations)
US3691620A
Cited
US3349953A
Cited
US3394843A
Cited
US3396923A
Cited
US3561639A
Cited
US3506224A
Cited
US3650431A
Cited
US3703976A
Cited
US3708330A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |