US4663108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum liner for a plasma device
Assignee: GA Technologies Inc
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Filing: 1984-10-25
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Granted: 1987-05-05
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Expires: 2004-10-25
Abstract
Abstract A vacuum liner for containing plasma in a plasma device. The liner includes a vacuum tight liner wall formed by sections with each section having a closed peripheral wall defining an interior with open ends. Adjacent interiors of the adjacent section form a plasma path. Some of the sections are bellows-shaped having a plurality of corrugations extending transversely to the axis of the plasma path. The liner also includes means for keeping the plasma from the liner wall. The limiter means includes a ring formed by beads nested in the interior grooves formed by each of the corrugations, with at least some of the beads extending from their grooves past the interior ridges flanking them. The material from which the beads are formed has a higher melting temperature than that of the material in which the sections are formed.
Inventors
- 👤 Thomas N. Carlstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:32
CPC Classifications
G; G21; G21B; G21B1/00; G21B1/11; G21B1/13; Y; Y02; Y02E; Y02E30/00; Y02E30/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
134 words
A vacuum liner for containing plasma in a high energy plasma device, said liner comprising: a vacuum tight liner wall made up by a series of sections, each section having a closed peripheral wall defining an interior with open ends, with adjacent interiors of adjacent sections forming a plasma path, said sections being bellows-shaped and having a plurality of corrugations extending transversely to the axis of said plasma path; and means for limiting the plasma for said liner wall and comprising a ring formed by beads nested in the interior groove formed by each of said corrugations, said beads extending from their grooves inwardly past the interior ridges flanking them, the material from which said beads are formed having a higher melting temperature than that of the material from which said sections are formed.
Claim 2
Dependent Claim
134 words
A vacuum liner for containing plasma in a high energy plasma device, said liner comprising: a vacuum tight liner wall made up by a series of sections, each section having a closed peripheral wall defining an interior with open ends, with adjacent interiors of adjacent sections forming a plasma path, said sections being bellows-shaped and having a plurality of corrugations extending transversely to the axis of said plasma path; and means for limiting the plasma for said liner wall and comprising a ring formed by beads nested in the interior groove formed by each of said corrugations, said beads extending from their grooves inwardly past the interior ridges flanking them, the material from which said beads are formed having a higher melting temperature than that of the material from which said sections are formed.
Claim 3
Dependent Claim
16 words
A vacuum liner as set forth in claim 1 wherein said liner wall defines a torus.
Claim 4
Dependent Claim
33 words
A vacuum liner as set forth in claim 1 wherein each bead has an aperture therethrough and each ring further comprises fastening means extending through the apertures of the beads forming said ring.
Claim 5
Dependent Claim
17 words
A vacuum liner as set forth in claim 1 wherein said liner wall is formed of steel.
Claim 6
Dependent Claim
16 words
A vacuum liner as set forth in claim 1 wherein said beads are formed of carbon.
Claim 7
Dependent Claim
34 words
A vacuum liner as set forth in claim 1 wherein certain of said beads have a stem received by a groove and an arm extending outwardly over an interior ridge partially defining said groove.
Claim 8
Dependent Claim
20 words
A vacuum liner as set forth in claim 6 wherein said arm overlaps a bead disposed in an adjacent groove.
Claim 9
Dependent Claim
27 words
A vacuum liner as set forth in claim 6 wherein said certain beads having oppositely extending arms, each arm overlapping a bead in a respective adjacent groove.
Claim 10
Dependent Claim
29 words
A vacuum liner as set forth in claim 8 wherein said bead in an adjacent row is formed as a split cylinder having a flat surface facing the plasma.
Claim 11
Dependent Claim
45 words
A vacuum liner as set forth in claim 3 wherein said fastening means is a piece of resilient wire having a length greater than the circumference of its ring so that the ends of said piece both are disposed in the apertures of adjacent beads.
Claim 12
Dependent Claim
57 words
A vacuum liner as set forth in claim 10 wherein all beads in a ring are held in compression and wherein each bead has a tail portion with a concavity and further has a nose portion sized for reception in the concavity of the next bead, whereby all portions of said wire are shaded from said plasma.
Claim 13
Dependent Claim
57 words
A vacuum liner as set forth in claim 1 wherein said bellows-shaped sections are first sections and wherein said liner wall also includes second sections each having a peripheral wall defining an interior with open ends, the interiors of said second sections also forming parts of said plasma path, said second sections having generally smooth inner surfaces.
Claim 14
Dependent Claim
34 words
A vacuum liner as set forth in claim 12 wherein said means for limiting movement of the plasma further comprises a ring formed by tiles substantially covering the inner surface of each second section.
References Cited (Backward Citations)
US3109801A
Cited
US4414176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-04 | 1990-11-03 | 1991-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-04 | 1994-11-03 | 1995-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-04 | 1998-11-03 | 1999-05-05 | $7700.00 | Window Closed / Lapsed |