US4140448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure apparatus
Assignee: SCANDIAMANT AB
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Filing: 1978-03-27
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Granted: 1979-02-20
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Expires: 1998-03-27
Abstract
Abstract A high pressure apparatus for the manufacture of diamonds includes a pressure chamber formed of holes in annular, disc-like members arranged one after the other and a pair of opposed pressure-exerting members movable into the chamber formed by the holes with compressible gaskets arranged between adjacent disc-like members. The pressure exerting members are frusto-conical and the ends of the holes adjacent these members are similarly shaped.
Inventors
- 👤 Bertram Brinkeborn
- 👤 Henry Halldin
- 👤 Hakan Lindqvist
- 👤 Erik Lundblad
- 👤 Kjell Nilsson
- 👤 Pertti Syvakari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:28
CPC Classifications
B; B01; B01J; B01J3/00; B01J3/06; B01J3/065
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
143 words
In a high pressure apparatus comprising a ring defining a pressure chamber at its center, a pair of opposed punches at least one of which is movable in a direction toward the other and toward the interior of the pressure chamber, and sealing material between each punch and the mouth of the chamber; the improvement in which the ring is comprised of at least two superimposed coaxial annular laminae, and an outwardly peripherally unconstrained compressible gasket surrounding the cavity and interposed between each pair of adjacent laminae, said gasket being of a material selected from the group consisting of pyrophyllite, talc, pot stone, catlinite, lithographic stone and hexagonal boron nitride, which gasket compresses and spreads radially outwardly as the distance between the punches decreases and the punches apply pressure to the ring and the laminae of the ring move axially toward each other.
Claim 2
Dependent Claim
143 words
In a high pressure apparatus comprising a ring defining a pressure chamber at its center, a pair of opposed punches at least one of which is movable in a direction toward the other and toward the interior of the pressure chamber, and sealing material between each punch and the mouth of the chamber; the improvement in which the ring is comprised of at least two superimposed coaxial annular laminae, and an outwardly peripherally unconstrained compressible gasket surrounding the cavity and interposed between each pair of adjacent laminae, said gasket being of a material selected from the group consisting of pyrophyllite, talc, pot stone, catlinite, lithographic stone and hexagonal boron nitride, which gasket compresses and spreads radially outwardly as the distance between the punches decreases and the punches apply pressure to the ring and the laminae of the ring move axially toward each other.
Claim 3
Dependent Claim
26 words
Apparatus as claimed in claim 1, there being a plurality of said gaskets disposed one between each of a plurality of pairs of said adjacent laminae.
Claim 4
Dependent Claim
13 words
Apparatus as claimed in claim 1, in which said gasket is of pyrophyllite.
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) | 1982-02-19 | 1982-08-21 | 1983-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-19 | 1986-08-21 | 1987-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-19 | 1990-08-21 | 1991-02-20 | $7700.00 | Window Closed / Lapsed |