Patent US2614120A successfully refreshed from Google Patents.
US4382113A
Expired / Lapsed
US
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Method for joining graphite to graphite
Assignee: Energy Development Associates Inc
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Filing: 1981-03-23
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Granted: 1983-05-03
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Expires: 2001-03-23
Abstract
Abstract A method of joining together a plurality of graphite members providing a low transition resistance is described. The method includes the steps of interposing a layer of a thermally sensitive material between the graphite members to be joined, applying pressure to force the graphite members together, applying sufficient heat to melt the thermally sensitive material, and releasing the pressure after providing a period of time for cooling. The thermally sensitive material is preferably composed from a thermoplastic material, and the heat for melting this material is preferably provided by resistance brazing.
Inventors
- 👤 Stephan Schwartz
- 👤 Olle Ramstrom
- 👤 Ake Bjareklint
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:54
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/0004; B23K1/19; C; C04; C04B; C04B37/00; C04B37/008; C04B2237/00; C04B2237/30; C04B2237/32; C04B2237/36; C04B2237/363; H; H01; H01M; H01M50/00; H01M50/50; H01M50/531; H01M50/534; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/49114; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
95 words
A method of joining together a plurality of graphite plates providing a low transition resistance, comprising the steps of: (a) interposing a layer of thermally sensitive plastic material between said graphite plates; (b) applying a predetermined amount of pressure to said graphite plates forcing said graphite plates together; (c) applying sufficient heat to said graphite plates to melt said layer of thermally sensitive plastic material; (d) providing a predetermined period of time for cooling after said layer of thermally sensitive plastic material is melted; and (e) releasing said application of pressure to said graphite plates.
Claim 2
Independent Claim
95 words
A method of joining together a plurality of graphite plates providing a low transition resistance, comprising the steps of: (a) interposing a layer of thermally sensitive plastic material between said graphite plates; (b) applying a predetermined amount of pressure to said graphite plates forcing said graphite plates together; (c) applying sufficient heat to said graphite plates to melt said layer of thermally sensitive plastic material; (d) providing a predetermined period of time for cooling after said layer of thermally sensitive plastic material is melted; and (e) releasing said application of pressure to said graphite plates.
Claim 3
Dependent Claim
16 words
The method according to claim 1, wherein said thermally sensitive plastic material is a thermoplastic material.
Claim 4
Dependent Claim
17 words
The method according to claim 2, wherein said thermoplastic material is in the form of a powder.
Claim 5
Dependent Claim
24 words
The method according to claim 3, wherein said layer of thermoplastic power is sufficient to uniformly cover a joining surface between said graphite plates.
Claim 6
Dependent Claim
16 words
The method according to claim 1, wherein said application of heat is provided by resistance brazing.
Claim 7
Dependent Claim
23 words
The method according to claim 1, wherein said period of time for cooling is sufficient to permit said thermally sensitive material to solidify.
Claim 8
Dependent Claim
15 words
The method according to claim 1, wherein said graphite plates are manufactured from dense graphite.
Claim 9
Dependent Claim
17 words
The method according to claim 1, wherein one of said graphite plates is manufactured from porous graphite.
Claim 10
Dependent Claim
17 words
The method according to claim 1, wherein said joining surface constitutes only a portion of said plates.
Claim 11
Dependent Claim
24 words
The method according to claim 1, further including the step of sandblasting said graphite plates before the application of said thermally sensitive plastic material.
Claim 12
Independent Claim
239 words
A method of joining a plurality of graphite plates to a graphite frame interposed between said graphite plates to form an electrode structure having a low transition resistance, each of said graphite plates having a joining surface portion and an exterior opposing surface, and said graphite frame having a first and second opposing mating side, comprising the steps of: (a) applying a first layer of a thermally sensitive plastic material to said joining surface portion of a first graphite plate; (b) positioning said first mating side of said graphite frame to rest upon said first layer of thermally sensitive plastic material over said joining surface portion of said first graphite plate; (c) applying a second layer of said thermally sensitive plastic material to said second mating side of said graphite frame; (d) positioning said joining surface portion of a second graphite plate to rest upon said second layer of thermally sensitive plastic material over said second mating side of said graphite frame; (e) applying a predetermined amount of pressure to said exterior surfaces of said graphite plates forcing said joining surface portions and said mating sides of said graphite plate together; (f) applying sufficient heat to said graphite members to melt said layers of thermally sensitive plastic material; (g) providing a predetermined period of time for cooling after said layers of thermally sensitive plastic material have been melted; and (h) releasing said electrode structure from said application of pressure.
Claim 13
Independent Claim
239 words
A method of joining a plurality of graphite plates to a graphite frame interposed between said graphite plates to form an electrode structure having a low transition resistance, each of said graphite plates having a joining surface portion and an exterior opposing surface, and said graphite frame having a first and second opposing mating side, comprising the steps of: (a) applying a first layer of a thermally sensitive plastic material to said joining surface portion of a first graphite plate; (b) positioning said first mating side of said graphite frame to rest upon said first layer of thermally sensitive plastic material over said joining surface portion of said first graphite plate; (c) applying a second layer of said thermally sensitive plastic material to said second mating side of said graphite frame; (d) positioning said joining surface portion of a second graphite plate to rest upon said second layer of thermally sensitive plastic material over said second mating side of said graphite frame; (e) applying a predetermined amount of pressure to said exterior surfaces of said graphite plates forcing said joining surface portions and said mating sides of said graphite plate together; (f) applying sufficient heat to said graphite members to melt said layers of thermally sensitive plastic material; (g) providing a predetermined period of time for cooling after said layers of thermally sensitive plastic material have been melted; and (h) releasing said electrode structure from said application of pressure.
Claim 14
Independent Claim
118 words
A method of resistance brazing a plurality of graphite plates, comprising the steps of: (a) applying a predetermined quantity of thermally sensitive plastic material to a first graphite plate; (b) positioning a second graphite plate to rest upon said layer of thermally sensitive plastic material; (c) applying a predetermined amount of pressure to said graphite plates forcing said graphite plates together; (d) passing sufficient electrical current through said first graphite plate, said layer of thermally sensitive plastic material, and said second graphite plate to melt said thermally sensitive plastic material; (e) providing a period of time for cooling after said thermally sensitive plastic material has been melted; and (f) releasing said application of pressure from said graphite plates.
Claim 15
Independent Claim
118 words
A method of resistance brazing a plurality of graphite plates, comprising the steps of: (a) applying a predetermined quantity of thermally sensitive plastic material to a first graphite plate; (b) positioning a second graphite plate to rest upon said layer of thermally sensitive plastic material; (c) applying a predetermined amount of pressure to said graphite plates forcing said graphite plates together; (d) passing sufficient electrical current through said first graphite plate, said layer of thermally sensitive plastic material, and said second graphite plate to melt said thermally sensitive plastic material; (e) providing a period of time for cooling after said thermally sensitive plastic material has been melted; and (f) releasing said application of pressure from said graphite plates.
Claim 16
Dependent Claim
41 words
A composite structure, comprising: a plurality of graphite plates bonded together by a layer of thermally sensitive plastic material interposed between said graphite plates, said thermally sensitive plastic material having been melted and joined to said graphite plates by capillary action.
Claim 17
Dependent Claim
41 words
A composite structure, comprising: a plurality of graphite plates bonded together by a layer of thermally sensitive plastic material interposed between said graphite plates, said thermally sensitive plastic material having been melted and joined to said graphite plates by capillary action.
Claim 18
Independent Claim
95 words
A method of joining together a plurality of graphite members providing a low transition resistance, comprising the steps of: (a) interposing a layer of thermally sensitive ceramic material between said graphite members; (b) applying a predetermined amount of pressure to said graphite members forcing said graphite members together; (c) applying sufficient heat to said graphite members to melt said layer of thermally sensitive ceramic material; (d) providing a predetermined period of time for cooling after said layer of thermally sensitive ceramic material is melted; and (e) releasing said application of pressure to said graphite members.
Claim 19
Independent Claim
95 words
A method of joining together a plurality of graphite members providing a low transition resistance, comprising the steps of: (a) interposing a layer of thermally sensitive ceramic material between said graphite members; (b) applying a predetermined amount of pressure to said graphite members forcing said graphite members together; (c) applying sufficient heat to said graphite members to melt said layer of thermally sensitive ceramic material; (d) providing a predetermined period of time for cooling after said layer of thermally sensitive ceramic material is melted; and (e) releasing said application of pressure to said graphite members.
Claim 20
Independent Claim
95 words
A method of joining together a plurality of graphite members providing a low transition resistance, comprising the steps of: (a) interposing a layer of thermally sensitive plastic powder between said graphite members; (b) applying a predetermined amount of pressure to said graphite members forcing said graphite members together; (c) applying sufficient heat to said graphite members to melt said layer of thermally sensitive plastic powder; (d) providing a predetermined period of time for cooling after said layer of thermally sensitive plastic powder is melted; and (e) releasing said application of pressure to said graphite members.
Claim 21
Independent Claim
95 words
A method of joining together a plurality of graphite members providing a low transition resistance, comprising the steps of: (a) interposing a layer of thermally sensitive plastic powder between said graphite members; (b) applying a predetermined amount of pressure to said graphite members forcing said graphite members together; (c) applying sufficient heat to said graphite members to melt said layer of thermally sensitive plastic powder; (d) providing a predetermined period of time for cooling after said layer of thermally sensitive plastic powder is melted; and (e) releasing said application of pressure to said graphite members.
Claim 22
Dependent Claim
26 words
The method according to claim 15, wherein said layer of thermally sensitive plastic powder is sufficient to uniformly cover a joining surface between said graphite members.
Claim 23
Dependent Claim
16 words
The method according to claim 16, wherein said application of heat is provided by resistance brazing.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-02 | 1986-11-01 | 1987-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-02 | 1990-11-01 | 1991-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-02 | 1994-11-01 | 1995-05-03 | $7700.00 | Window Closed / Lapsed |