US4492103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for manufacturing rupture disks
Assignee: BS&B Safety Systems Ltd
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Filing: 1984-04-20
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Granted: 1985-01-08
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Expires: 2004-04-20
Abstract
Abstract An improved apparatus for manufacturing a rupture disk containing one or more scores or perforations from a sheet metal section comprising the steps of cutting the sheet metal section into a disk, forming a concave-convex dome in the disk by applying pressurized fluid to one side thereof, and then forming one or more scores or perforations in the concave-convex dome of the disk while continuing to apply pressurized fluid thereto.
Inventors
- 👤 Leo J. Naumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:11
CPC Classifications
B; B21; B21D; B21D26/00; B21D26/02; B21D26/021; B21D26/025; B21D26/029; B21D53/00; B21D53/80; F; F16; F16K; F16K17/00; F16K17/02; F16K17/14; F16K17/16; F16K17/1606
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
177 words
Apparatus for manufacturing scored or perforated rupture disks from sheet metal sections comprising: a base; a rupture disk forming die removably attached to said base; means for sealingly clamping a sheet metal section to said die and cutting said section into a disk movably positioned adjacent said die; means for applying pressurized fluid to a sheet metal disk whereby said disk is forced against and conformed to said die attached to said clamping and cutting means; means for selectively moving said clamping and cutting means into and out of clamping and cutting contact with a sheet metal section attached to said base and to said clamping and cutting means; a movable ram having a score or perforation forming blade attached thereto sealingly attached to said clamping and cutting means and positioned to move said blade into forceable contact with a sheet metal disk forced against and conformed to said die whereby scores or perforations are formed on or in said disk; and means for selectively moving said ram attached thereto and to said clamping and cutting means.
Claim 2
Dependent Claim
177 words
Apparatus for manufacturing scored or perforated rupture disks from sheet metal sections comprising: a base; a rupture disk forming die removably attached to said base; means for sealingly clamping a sheet metal section to said die and cutting said section into a disk movably positioned adjacent said die; means for applying pressurized fluid to a sheet metal disk whereby said disk is forced against and conformed to said die attached to said clamping and cutting means; means for selectively moving said clamping and cutting means into and out of clamping and cutting contact with a sheet metal section attached to said base and to said clamping and cutting means; a movable ram having a score or perforation forming blade attached thereto sealingly attached to said clamping and cutting means and positioned to move said blade into forceable contact with a sheet metal disk forced against and conformed to said die whereby scores or perforations are formed on or in said disk; and means for selectively moving said ram attached thereto and to said clamping and cutting means.
Claim 3
Dependent Claim
45 words
The apparatus of claim 1 wherein said rupture disk forming die has a forming configuration such that when said sheet metal disk is forced against and conformed to said die, said disk is formed into a central concave-convex dome connected to an annular flat flange.
Claim 4
Dependent Claim
27 words
The apparatus of claim 1 wherein said means for selectively moving said clamping and cutting means and said means for selectively moving said ram are hydraulic cylinders.
Claim 5
Dependent Claim
35 words
The apparatus of claim 2 which is further characterized to include means for punching at least two locating holes in the annular flat flange portion of said disk attached to said clamping and cutting means.
Claim 6
Dependent Claim
32 words
The apparatus of claim 2 wherein said score or perforation forming blade is of a size such that scores or perforations are formed on the central concave-convex dome portion of said disk.
Claim 7
Dependent Claim
32 words
The apparatus of claim 5 wherein said score or perforation forming blade is a score forming blade and is of a configuration such that a circular score is formed on said disk.
Claim 8
Dependent Claim
46 words
The apparatus of claim 5 wherein said score or perforation forming blade is of a configuration such that at least one score or perforation which radiates outwardly from a central portion of said concave-convex dome to the periphery thereof is formed on or in said disk.
Claim 9
Dependent Claim
26 words
The apparatus of claim 2 wherein said rupture disk forming die includes a circular forming face having a flat annular portion surrounding a concave recess portion.
Claim 10
Dependent Claim
14 words
The apparatus of claim 8 wherein said score or perforation forming blade is convex.
Claim 11
Dependent Claim
35 words
The apparatus of claim 1 wherein said means for applying pressurized fluid comprise: a pressurized fluid passageway disposed in said ram; and conduit means connected to said passageway and to a source of pressurized fluid.
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) | 1988-01-08 | 1988-07-09 | 1989-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-08 | 1992-07-09 | 1993-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-08 | 1996-07-09 | 1997-01-08 | $7700.00 | Window Closed / Lapsed |