US3834580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety pressure relief device
Assignee: Black Sivalls and Bryson Inc
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Filing: 1972-09-25
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Granted: 1974-09-10
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Expires: 1992-09-25
Abstract
Abstract The present invention relates to an improved safety pressure relief device of the type having a concave-convex reverse buckling rupture disk supported between inlet and outlet supporting members. By the present invention the rupture disk includes scores on a surface of the concave-convex portion thereof creating lines of weakness therein, and an area of relative weakness is positioned at the center of the concaveconvex portion so that upon failure the disk reverses itself from the center of the concave-convex portion outwardly towards the periphery thereof and then tears along the lines of weakness.
Inventors
- 👤 G Ludwig
- 👤 L Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:30
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/14; F16K17/16; F16K17/1606; F16K17/1613; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1692; Y10T137/1714; Y10T137/1729; Y10T137/1737; Y10T137/1744; Y10T137/1759
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
170 words
In a reverse buckling safety pressure relief device having a concave-convex disk supported between inlet and outlet supporting members with the convex side of said disk positioned facing the inlet supporting member, the improvement which comprises: said disk having at least one score on a surface of the concaveconvex portion thereof creating at least one line of weakness therein of a character such that upon failure of said disk, the concave-convex portion first reverses itself and then tears along said line of weakness without fragmentation; and said disk including an area formed at the center of said concave-convex portion thereof having a thickness less than the thickness of the remainder of said disk thereby providing an area of relative weakness positioned at the center of said disk so that the compressive strength of said disk at the center thereof is less than the compressive strength of the remainder of the disk and upon failure, the disk reverses itself from the center of the concave-convex portion outwardly towards the periphery thereof.
Claim 2
Dependent Claim
170 words
In a reverse buckling safety pressure relief device having a concave-convex disk supported between inlet and outlet supporting members with the convex side of said disk positioned facing the inlet supporting member, the improvement which comprises: said disk having at least one score on a surface of the concaveconvex portion thereof creating at least one line of weakness therein of a character such that upon failure of said disk, the concave-convex portion first reverses itself and then tears along said line of weakness without fragmentation; and said disk including an area formed at the center of said concave-convex portion thereof having a thickness less than the thickness of the remainder of said disk thereby providing an area of relative weakness positioned at the center of said disk so that the compressive strength of said disk at the center thereof is less than the compressive strength of the remainder of the disk and upon failure, the disk reverses itself from the center of the concave-convex portion outwardly towards the periphery thereof.
Claim 3
Dependent Claim
27 words
The safety pressure relief device of claim 1 wherein said score on said concave-convex portion of said disk extends from the center to near the periphery thereof.
Claim 4
Dependent Claim
42 words
The safety pressure relief deVice of claim 2 wherein said score is of a character such that the force which causes the disk to reverse is sufficient to cause said disk to tear along said line of weakness created by said score.
Claim 5
Dependent Claim
37 words
The safety pressure relief device of claim 1 wherein said area formed at the center of the concave-convex portion of said disk having a thickness less than the thickness of the remainder of said disk is circular.
Claim 6
Dependent Claim
29 words
The safety pressure relief device of claim 4 which is further characterized to include means attached to said outlet supporting member for penetrating said disk when said disk reverses.
Claim 7
Dependent Claim
164 words
In a reverse buckling safety pressure relief device having a concave-convex reverse buckling rupture disk supported between inlet and outlet supporting members, the improvement which comprises: said disk having an annular flat flange portion connected to said concave-convex portion by a transition connection; the concave-convex portion of said disk including at least one score on a surface thereof creating at least one line of weakness therein of a character such that upon failure of said disk the concave-convex portion first reverses itself and then tears along said line of weakness without fragmentation; and the concave-convex portion of said disk including a circular area formed in the center thereof having a thickness less than the thickness of the remainder of said disk so that the compressive strength of said disk at the center thereof is less than the compressive strength of the remainder of said disk and on failure, said disk reverses itself from the center of said concave-convex portion outwardly towards the periphery thereof.
Claim 8
Dependent Claim
164 words
In a reverse buckling safety pressure relief device having a concave-convex reverse buckling rupture disk supported between inlet and outlet supporting members, the improvement which comprises: said disk having an annular flat flange portion connected to said concave-convex portion by a transition connection; the concave-convex portion of said disk including at least one score on a surface thereof creating at least one line of weakness therein of a character such that upon failure of said disk the concave-convex portion first reverses itself and then tears along said line of weakness without fragmentation; and the concave-convex portion of said disk including a circular area formed in the center thereof having a thickness less than the thickness of the remainder of said disk so that the compressive strength of said disk at the center thereof is less than the compressive strength of the remainder of said disk and on failure, said disk reverses itself from the center of said concave-convex portion outwardly towards the periphery thereof.
Claim 9
Dependent Claim
36 words
The safety pressure relief device of claim 6 which is further characterized to include each of said supporting members having an annular flat portion to coact and support the annular flat flange portions of said disk.
Claim 10
Dependent Claim
29 words
The safety pressure relief device of claim 7 wherein the scores on the concave-convex portion of said disk intersect at the center and extend to near the periphery thereof.
Claim 11
Dependent Claim
42 words
The safety pressure relief device of claim 8 wherein the scores are of a character such that the force which causes the disk to reverse is sufficient to cause said disk to tear along the lines of weakness created by said scores.
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |