US3901259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure relief apparatus
Assignee: Marston Excelsior Ltd
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Filing: 1974-09-06
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Granted: 1975-08-26
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Expires: 1994-09-06
Abstract
Abstract Safety pressure relief apparatus having a reverse buckling pressure relief disc secured by its edge region between two support members solely by virtue of the axial pressure exerted upon the disc by the support members and the area of the edge region of the disc being such that when the disc is reversed upon build up of pressure within a vessel, the edge region is released from between the two support members by radial movement inwards of the disc.
Inventors
- 👤 Alan Reginald Banbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:48
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/14; F16K17/16; F16K17/1606; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1692; Y10T137/1714; Y10T137/1729; Y10T137/1737
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
191 words
A safety pressure relief apparatus comprising a reverse bucking pressure relief disc having an edge and edge regions of a given area, inner and outer support members having a planar parallel gripping surfaces, said disc being secured between said members solely by axial pressure exerted upon said edge regions of said given area of said disc by said planar parallel gripping surfaces, said given area of said edge regions being so dimensioned and said axial pressure being such that when said disc is reversed upon the attainment of a predetermined pressure said edge regions are caused to move radially inwards from between and are released from said support members, and abutment means disposed around said edge of said disc and around the parallel gripping surfaces for restricting radially outward expansion of said edge of said disc, said abutment means comprises an axially extending shoulder on one of said support members parallel to an axial extending shoulder on the other support member which is disposed radially within an axial end portion of said one support member so that said other support member lies between two axial ends of said one support member.
Claim 2
Dependent Claim
191 words
A safety pressure relief apparatus comprising a reverse bucking pressure relief disc having an edge and edge regions of a given area, inner and outer support members having a planar parallel gripping surfaces, said disc being secured between said members solely by axial pressure exerted upon said edge regions of said given area of said disc by said planar parallel gripping surfaces, said given area of said edge regions being so dimensioned and said axial pressure being such that when said disc is reversed upon the attainment of a predetermined pressure said edge regions are caused to move radially inwards from between and are released from said support members, and abutment means disposed around said edge of said disc and around the parallel gripping surfaces for restricting radially outward expansion of said edge of said disc, said abutment means comprises an axially extending shoulder on one of said support members parallel to an axial extending shoulder on the other support member which is disposed radially within an axial end portion of said one support member so that said other support member lies between two axial ends of said one support member.
Claim 3
Dependent Claim
49 words
Apparatus as recited in claim 1 wherein said safety pressure relief apparatus is responsive to pressure in a vessel, means for preventing complete escape of said disc from said vessel when said disc is released from between said supporting members being provided on the outlet side of said disc.
Claim 4
Dependent Claim
29 words
Apparatus as recited in claim 2 wherein said means for preventing escape of said disc from said vessel comprises a grid disposed within an outlet passage of said vessel.
Claim 5
Dependent Claim
200 words
A safety pressure relief apparatus for use in a pressure vessel comprising a reverse buckling pressure relief disc having an edge and edge regions of a given area, inner and outer support members having planar parallel gripping surfaces, said disc being secured between said members solely by axial pressure exerted upon said edge regions of said given area by said planar parallel gripping surfaces, said given area of said edge regions being so dimensioned and said axial pressure being such that when said disc is reversed upon the attainment of a predetermined pressure within said pressure vessel said edge regions are caused to move radially inwards from between and are released from said support members, abutment means disposed around said edge of said disc and around the parallel gripping surfaces for restricting radially outward expansion of said edge of said disc, one of said inner and outer support members being retained axially between the ends of said other member and a holding means for retaining said inner and outer members therebetween, the holding means gripping the ends of said other member and avoiding axial pressure upon said one member so as not to increase the axial pressure upon the disc.
Claim 6
Dependent Claim
200 words
A safety pressure relief apparatus for use in a pressure vessel comprising a reverse buckling pressure relief disc having an edge and edge regions of a given area, inner and outer support members having planar parallel gripping surfaces, said disc being secured between said members solely by axial pressure exerted upon said edge regions of said given area by said planar parallel gripping surfaces, said given area of said edge regions being so dimensioned and said axial pressure being such that when said disc is reversed upon the attainment of a predetermined pressure within said pressure vessel said edge regions are caused to move radially inwards from between and are released from said support members, abutment means disposed around said edge of said disc and around the parallel gripping surfaces for restricting radially outward expansion of said edge of said disc, one of said inner and outer support members being retained axially between the ends of said other member and a holding means for retaining said inner and outer members therebetween, the holding means gripping the ends of said other member and avoiding axial pressure upon said one member so as not to increase the axial pressure upon the disc.
Claim 7
Dependent Claim
183 words
A safety pressure relief apparatus for use in a pressure vessel comprising, a reverse buckling pressure relief disc having an edge and edge regions of a given area, inner and outer support members having planar parallel gripping surfaces, said disc being secured between said members solely by axial pressure exerted upon said edge regions of said given area by said planar parallel gripping surfaces, said given area of said edge regions being so dimensioned and Said axial pressure being such that when said disc is reversed upon the attainment of a predetermined pressure within said pressure vessel said edge regions are caused to move radially inwards from between and are released from said support members, abutment means disposed around said edge of said disc and around the parallel gripping surfaces for restricting radially outward expansion of said edge of said disc, one of said support members being retained axially between the two ends of the other support member, and the other support member having two axially oppositely disposed end engagement surfaces for engagement by a holding means for securement to said pressure vessel.
Claim 8
Dependent Claim
183 words
A safety pressure relief apparatus for use in a pressure vessel comprising, a reverse buckling pressure relief disc having an edge and edge regions of a given area, inner and outer support members having planar parallel gripping surfaces, said disc being secured between said members solely by axial pressure exerted upon said edge regions of said given area by said planar parallel gripping surfaces, said given area of said edge regions being so dimensioned and Said axial pressure being such that when said disc is reversed upon the attainment of a predetermined pressure within said pressure vessel said edge regions are caused to move radially inwards from between and are released from said support members, abutment means disposed around said edge of said disc and around the parallel gripping surfaces for restricting radially outward expansion of said edge of said disc, one of said support members being retained axially between the two ends of the other support member, and the other support member having two axially oppositely disposed end engagement surfaces for engagement by a holding means for securement to said pressure vessel.
References Cited (Backward Citations)
US3294277A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |