Patent US3215611A successfully refreshed from Google Patents.
Patent US3915235A successfully refreshed from Google Patents.
US3915235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bursting disc assembly
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1973-05-11
•
Granted: 1975-10-28
•
Expires: 1993-05-11
Abstract
Abstract A frangible disc assembly for use in fire fighting and safety devices wherein a frangible disc of toughened glass is shattered by a metal spike projected by pressurized gas, generated, for example, by a fast-burning gas-producing pyrotechnic composition.
Inventors
- 👤 John Hamilton
- 👤 Leslie Ernest Medlock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:58
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/40; F16K17/403; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1647; Y10T137/1692; Y10T137/1759; Y10T137/1767; Y10T137/8811
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
154 words
A fast-acting fluid delivery system comprising a. two fluid conduits arranged for fluid delivery along a path therebetween, b. a frangible disc of glass, of the type which shatters rapidly and completely if the surface skin is pierced, said disc having two faces joined by a peripheral edge, c. means for mounting said frangible disc of glass directly between said fluid conduits so that a face of said disc prevents fluid delivery along said path, d. a movable spike pointing towards said frangible disc, e. gas supply means for providing gas to act upon said spike to force it against said disc to rupture the surface layer thereof thereby shattering said disc and allowing fluid delivery between said fluid conduits, along said path, and f. means for mounting said movable spike for movement against said disc along a path all of which lies fully outside said path of fluid delivery between said fluid conduits.
Claim 2
Dependent Claim
154 words
A fast-acting fluid delivery system comprising a. two fluid conduits arranged for fluid delivery along a path therebetween, b. a frangible disc of glass, of the type which shatters rapidly and completely if the surface skin is pierced, said disc having two faces joined by a peripheral edge, c. means for mounting said frangible disc of glass directly between said fluid conduits so that a face of said disc prevents fluid delivery along said path, d. a movable spike pointing towards said frangible disc, e. gas supply means for providing gas to act upon said spike to force it against said disc to rupture the surface layer thereof thereby shattering said disc and allowing fluid delivery between said fluid conduits, along said path, and f. means for mounting said movable spike for movement against said disc along a path all of which lies fully outside said path of fluid delivery between said fluid conduits.
Claim 3
Dependent Claim
31 words
A fast-acting fluid delivery system as recited in claim 1 wherein said means for mounting said movable spike includes means for directing said movable spike against the edge of said disc.
Claim 4
Dependent Claim
33 words
A fast-acting fluid delivery system as recited in claim 1 wherein said means for mounting said frangible disc of glass directly between said fluid conduits includes gasket means associated with each said conduit.
Claim 5
Dependent Claim
28 words
A fast-acting fluid delivery system as recited in claim 1 wherein said gas supply means comprises a fast-burning gas-producing pyrotechnic composition with an electric fusehead ignition means therefore.
Claim 6
Dependent Claim
26 words
A fast-acting fluid delivery system as recited in claim 4 wherein said pyrotechnic composition is selected from the group consisting of lead dimitroresorcinate and lead styphnate.
Claim 7
Dependent Claim
40 words
A fast-acting fluid delivery system as recited in claim 4 wherein said pyrotechnic composition is completely contained, even after burning, in a vessel having a movable wall portion, and wherein said movable spike is connected to said movable wall portion.
Claim 8
Dependent Claim
28 words
A fast-acting fluid delivery system as recited in claim 6 wherein said movable wall portion of said vessel is provided by a piston slidably located in said vessel.
Claim 9
Dependent Claim
31 words
A fast-acting fluid delivery system as recited in claim 1 wherein said means for mounting said movable spike includes means for directing said movable spike against one face of said disc.
References Cited (Backward Citations)
US1933694A
Cited
FR825245A
Cited
GB567120A
Cited
GB693636A
Cited
US2780389A
Cited
US3494370A
Cited
US3288992A
Cited
US3633596A
Cited
US3726344A
Cited
US3731948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |