Patent US4853184A successfully refreshed from Google Patents.
US4853184A
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US
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Contact material for vacuum interrupter
Assignee: Mitsubishi Electric Corp
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Filing: 1984-09-11
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Granted: 1989-08-01
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Expires: 2004-09-11
Abstract
Abstract The invention relates to contact material for vacuum interrupter, and in order to be splendid in the breakdown voltage ability and increase the interrupting ability, a contact material is constituted by containing copper and chromium, and moreover adding one component selected from silicon, titanium, zirconium and aluminum as another component, and is used in a vacuum interrupter.
Inventors
- 👤 Naya Eizo
- 👤 Nagata Yoshikazu
- 👤 Horiuchi Toshiaki
- 👤 Okumura Mitsuhiro
- 👤 Demizu Michinosuke
- 👤 Harima Mitsuhiro
- 👤 Asakawa Shigeki
- 👤 Asakawa Masuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:13
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; H01H1/0203; H01H1/0206
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
39 words
A contact material for a vacuum interrupter containing copper as a basic component, and, as another component, from approximately 20 to 35% by weight of chromium, and further containing an amount of silicon about 5% by weight or below.
Claim 2
Dependent Claim
39 words
A contact material for a vacuum interrupter containing copper as a basic component, and, as another component, from approximately 20 to 35% by weight of chromium, and further containing an amount of silicon about 5% by weight or below.
Claim 3
Dependent Claim
58 words
A contact material for a vacuum interrupter in accordance with claim 1 wherein copper, chromium and silicon are distributed therein as a single metal, as a ternary alloy of these metals, as a binary alloy of these metals, as a ternary intermetallic compound of these metals, as a binary intermetallic compound of these metals, or as combinations thereof.
Claim 4
Dependent Claim
79 words
A contact material for a vacuum interrupter in accordance with claim 2 further containing no more than 20% by weight of at least one of the following: at least one low-melting-point metal selected from the group consisting of bismuth, tellurium, antimony, thallium, lead, selenium, cerium and calcium, at least one alloy of said low-melting-point metals, an intermetallic compound comprising at least one of said low-melting-point metals, or at least one oxide comprising at least one of said low-melting-point metals.
Claim 5
Dependent Claim
39 words
A contact material for a vacuum interrupter containing copper as a basic component, and, as another component, from about 20 to 30% by weight of chromium, and further containing an amount of aluminum approximately 3% by weight or below.
Claim 6
Dependent Claim
39 words
A contact material for a vacuum interrupter containing copper as a basic component, and, as another component, from about 20 to 30% by weight of chromium, and further containing an amount of aluminum approximately 3% by weight or below.
Claim 7
Dependent Claim
58 words
A contact material for a vacuum interrupter in accordance with claim 4 wherein copper, chromium and aluminum are distributed therein as a single metal, as a ternary alloy of these metals, as a binary alloy of these metals, as a ternary intermetallic compound of these metals, as a binary intermetallic compound of these metals, or as combinations thereof.
Claim 8
Dependent Claim
79 words
A contact material for a vacuum interrupter in accordance with claim 5 further containing no more than 20% by weight of at least one of the following: at least one low-melting-pont metal selected from the group consisting of bismuth, tellurium, antimony, thallium, lead, selenium, cerium and calcium, at least one alloy of said low-melting-point metals, an intermetallic compound comprising at least one of said low-melting-point metals, or at least one oxide comprising at least one of said low-melting-point metals.
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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) | 1992-07-31 | 1993-01-30 | 1993-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-31 | 1997-01-30 | 1997-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-31 | 2001-01-30 | 2001-08-01 | $7700.00 | Window Closed / Lapsed |