US3845879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety fitting
Assignee: Siemens AG
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Filing: 1973-03-26
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Granted: 1974-11-05
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Expires: 1993-03-26
Abstract
Abstract A safety fitting for a pipe or vessel and contained within a flange coupling, the fitting being of the type which will close off flow as long as the pressure on one side of the fitting exceeds the pressure on the other side and will rupture to permit flow when the pressure on the other side exceeds that on the one side is shown. A rupture disc with radial grooves is placed on the one side which will normally be at higher pressure and is backed by a perforated support member placed on the other side such that under normal conditions the support member supports the rupture disc in the area of the grooves. If pressure on the other side exceeds that on the one side the disc is no longer supported and will rupture allowing flow through the fitting.
Inventors
- 👤 B Dernbach
- 👤 E Jurisch
- 👤 H Landgraf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:29
CPC Classifications
G; G21; G21C; G21C9/00; G21C9/004; G21C9/008; F; F16; F16K; F16K17/00; F16K17/02; F16K17/14; F16K17/16; F16K17/162; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1692; Y10T137/1714; Y10T137/1744; Y10T137/1752
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
187 words
A safety fitting for use in pipe lines and the like comprising: a. a substantially flat rupture disc containing a plurality of radial grooves extending from the center to a predetermined distance from the rim of the disc thereby leaving annular area of undiminished cross section near the rim; b. a support member having a plurality of holes therein patterned so as to provide solid areas corresponding to the location of the grooves in said rupture disc; and c. means to support said rupture disc and said support member within a pipe line with said rupture disc resting against said support member with its grooves aligned with the solid areas of said support member, and facing the side of said pipe line in which a normally higher pressure is expected, whereby a higher pressure on said normal side of said line will press said rupture disc against said support member and prevent flow through the safety fitting but a higher pressure on the support member side of said safety fitting will cause said disc to rupture along said grooves and permit a flow through said safety fitting.
Claim 2
Dependent Claim
187 words
A safety fitting for use in pipe lines and the like comprising: a. a substantially flat rupture disc containing a plurality of radial grooves extending from the center to a predetermined distance from the rim of the disc thereby leaving annular area of undiminished cross section near the rim; b. a support member having a plurality of holes therein patterned so as to provide solid areas corresponding to the location of the grooves in said rupture disc; and c. means to support said rupture disc and said support member within a pipe line with said rupture disc resting against said support member with its grooves aligned with the solid areas of said support member, and facing the side of said pipe line in which a normally higher pressure is expected, whereby a higher pressure on said normal side of said line will press said rupture disc against said support member and prevent flow through the safety fitting but a higher pressure on the support member side of said safety fitting will cause said disc to rupture along said grooves and permit a flow through said safety fitting.
Claim 3
Dependent Claim
40 words
The invention according to claim 1, wherein the full thickness of said rupture disc and the diameter of said holes in said support member are such that normal system pressure will not cause said disc to rupture through said holes.
Claim 4
Dependent Claim
33 words
The invention according to claim 2 wherein the depth of the grooves in said rupture discs is of a thickness such as to cause the disc to rupture at a predetermined release pressure.
Claim 5
Dependent Claim
34 words
The invention according to claim 3 wherein the rupture disc is tightly weldEd to said support member at its rim and wherein said support member is sealingly supported within a pipe line flange connection.
Claim 6
Dependent Claim
45 words
The invention according to claim 4, wherein said support member is sealed by a pair of sealing rings placed respectively between one side of said support member and a first pipe flange and the other side of said support member and a second pipe flange.
Claim 7
Dependent Claim
23 words
The invention according to claim 3 wherein said rupture disc and said support member are sealingly supported within a pipe line flange connection.
Claim 8
Dependent Claim
17 words
The invention according to claim 6, wherein said rupture disc is also welded to said support member.
Claim 9
Dependent Claim
16 words
The invention according to claim 7 wherein said support member is sealed at least by welding.
Claim 10
Dependent Claim
37 words
The invention according to claim 8 and further including a pair of diaphram welding rings with one welded to each side of said support member and wherein said welding rings are welded to respective pipe line flanges.
Claim 11
Dependent Claim
46 words
The invention according to claim 9 wherein each of said welding ring contain an annular channel on its side which is welded to said support member and further including a pair of sealing ring placed in said channels between said welding rings and said support member.
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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |