US3906976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally activated burst disc
Assignee: Sundstrand Corp
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Filing: 1973-03-21
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Granted: 1975-09-23
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Expires: 1993-03-21
Abstract
Abstract A burst disc unit for safety relief use in a fuel tank, responsive to temperature, and bursting at a predetermined temperature. It includes a housing with a disc element sealed thereon, and eutectic material in the housing supporting the disc element. Also knife blades are provided in the housing. Upon the predetermined temperature being reached, the eutectic material melts and runs out and the fuel in the tank forces the disc element against the knife blades and bursts, or cuts, or breaks it and the fuel runs out.
Inventors
- 👤 Gary Dean Nohr
- 👤 Francis Richard Bollenbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:15
CPC Classifications
B; B64; B64D; B64D37/00; B64D37/32; F; F16; F16K; F16K17/00; F16K17/40; F16K17/403; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1692; Y10T137/1714; Y10T137/1729; Y10T137/1737; Y10T137/1752; Y10T137/1759; Y10T137/1797; Y10T137/1812
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
210 words
A burst disc unit comprising, a tubular housing adapted for mounting in a container, and having an inner end and an outer end, a rupturable disc element sealingly secured to the housing at the inner end of the latter and being dome-shaped and extending beyond the inner end of the housing, knife blade means having a plurality of blade elements in the housing with cutting edges presented to the disc element and positioned for engagement by the disc element, and puncturing of the latter, in response to flexure of the central portion of the disc element through the inner end of the tubular housing, and solid eutectic material in the housing and extending between the blade elements, and substantially embedding the knife blade means, and filling the inner end portion of the housing and bonded to the housing and retaining the knife blade means in position in the housing, and further extending inwardly of the housing to a position at least as far as the inner extremity of the knife blade means and thereby preventing the disc element from engaging the knife blade means, the eutectic material being meltable at a predetermined temperature enabling pressure against the disc element to move it against the knife blade means and puncturing it.
Claim 2
Dependent Claim
210 words
A burst disc unit comprising, a tubular housing adapted for mounting in a container, and having an inner end and an outer end, a rupturable disc element sealingly secured to the housing at the inner end of the latter and being dome-shaped and extending beyond the inner end of the housing, knife blade means having a plurality of blade elements in the housing with cutting edges presented to the disc element and positioned for engagement by the disc element, and puncturing of the latter, in response to flexure of the central portion of the disc element through the inner end of the tubular housing, and solid eutectic material in the housing and extending between the blade elements, and substantially embedding the knife blade means, and filling the inner end portion of the housing and bonded to the housing and retaining the knife blade means in position in the housing, and further extending inwardly of the housing to a position at least as far as the inner extremity of the knife blade means and thereby preventing the disc element from engaging the knife blade means, the eutectic material being meltable at a predetermined temperature enabling pressure against the disc element to move it against the knife blade means and puncturing it.
Claim 3
Dependent Claim
26 words
A burst disc unit according to claim 1 wherein the solid eutectic material normally engages the disc element and retains the latter in its dome shape.
Claim 4
Dependent Claim
60 words
A burst disc unit according to claim 2 wherein the housing includes an internal shoulder facing inwardly relatively to the housing, the knife blade means rests against the shoulder and is positively limited thereby from being displaced outwardly, and the solid eutectic material also engages the shoulder and extends outwardly beyond the shoulder and thus beyond the knife blade means.
Claim 5
Dependent Claim
105 words
A temperature sensitive relief unit for use in containers containing liquid or gas fluids comprising, a housing member having an inner end disposed to the interior of the container, a flexible rupturable sealing means disposed at said inner end of the housing for preventing the fluid from flowing through said housing member, eutectic means, meltable at a predetermined temperature and disposed adjacent said sealing means, for supporting said sealing means against flexure, and puncturing means, secured to said housing member and encompassed by said eutectic means, for rupturing said sealing means when said eutectic means melts and said sealing means flexures against said puncturing means.
Claim 6
Dependent Claim
105 words
A temperature sensitive relief unit for use in containers containing liquid or gas fluids comprising, a housing member having an inner end disposed to the interior of the container, a flexible rupturable sealing means disposed at said inner end of the housing for preventing the fluid from flowing through said housing member, eutectic means, meltable at a predetermined temperature and disposed adjacent said sealing means, for supporting said sealing means against flexure, and puncturing means, secured to said housing member and encompassed by said eutectic means, for rupturing said sealing means when said eutectic means melts and said sealing means flexures against said puncturing means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |