US3704807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety relief device
Assignee: Ametek Inc
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Filing: 1971-03-08
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Granted: 1972-12-05
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Expires: 1991-03-08
Abstract
Abstract A pre-bulged, frangible member and a relief device employing the frangible member is described. The member has a pre-determined burst pattern that is relieved into its crown which insures that no portion of the member is severed from the member when it fails. The basic pattern uses radial slits extending from the periphery of the crown and terminating short of the center. The center portion of the crown is relieved with a pattern employing at least one non-rupturable, interconnecting web between the apex and the remainder of the member so that, on failure, this web retains the apex of the crown.
Inventors
- 👤 Robert J Lidgard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:36
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/14; F16K17/16; F16K17/162; B; B65; B65D; B65D51/00; B65D51/16; B65D51/1633; B65D51/1638; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1692; Y10T137/1714; Y10T137/1729; Y10T137/1744; Y10T137/1752
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
148 words
A frangible support member for use in a frangible diaphragm relief device which member comprises a thin metal disc having a peripheral sealing flange for engagement between flanges of said device and a central crown portion with an arcuate diametrical cross section said crown portion having a base, an apex portion and a burst pattern comprising fracture lines relieved into the metal of the crown portion and extending across the base portion of the crown from the periphery of the crown radially inwardly towards the apex of the crown and terminating in close proximity to an apex fracture line relieved into the metal and extending partially about the apex of said crown through an open arc providing at least one non-rupturable and non-relived web portion between said apex and said base portions of said crown to thereby retain said apex to said base upon rupture of said member.
Claim 2
Dependent Claim
148 words
A frangible support member for use in a frangible diaphragm relief device which member comprises a thin metal disc having a peripheral sealing flange for engagement between flanges of said device and a central crown portion with an arcuate diametrical cross section said crown portion having a base, an apex portion and a burst pattern comprising fracture lines relieved into the metal of the crown portion and extending across the base portion of the crown from the periphery of the crown radially inwardly towards the apex of the crown and terminating in close proximity to an apex fracture line relieved into the metal and extending partially about the apex of said crown through an open arc providing at least one non-rupturable and non-relived web portion between said apex and said base portions of said crown to thereby retain said apex to said base upon rupture of said member.
Claim 3
Dependent Claim
39 words
The member of claim 1 wherein said fracture lines comprise radial slits extending through the entire thickness of said metal disc and with their ends terminating in circular apertures also extending through the entire thickness of said metal disc.
Claim 4
Dependent Claim
29 words
The member of claim 1 wherein said apex fracture lines comprise an arcuate slot through said metal disc extending through a continuous open arc from 200* to about 310*.
Claim 5
Dependent Claim
34 words
The member of claim 2 wherein said apex fracture lines comprise a plurality of arcuate slots spaced along an open arc of from 200* to 310* with narrow, unrelieved webs spaced between said slots.
Claim 6
Dependent Claim
71 words
The member of claim 1 wherein said member has a first circular row of apertures spaced circumferentially about the base portion of said crown and a second circular row of an equal number of apertures circumferentially spaced about the apex of said crown with a continuous slit through said metal extending radially from each aperture in the first row of apertures to a corresponding aperture in the second row of apertures.
Claim 7
Dependent Claim
32 words
The member of claim 1 in combination with an imperforate member having a central crown with a mating arcuate diametrical cross section nesting against the concave side of said frangible support member.
Claim 8
Dependent Claim
43 words
The combination of claim 1 in further combination with a second frangible support member nesting against the concave side of said imperforate member and having a central crown with a mating arcuate diametrical cross section and a bursting pattern relieved into its crown.
Claim 9
Dependent Claim
21 words
The member of claim 1 wherein said fracture lines compRise radial slots extending through the entire thickness of said metal disc.
References Cited (Backward Citations)
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US2766904A
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US2953279A
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US2954897A
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US2980286A
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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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |