Patent US4123199A successfully refreshed from Google Patents.
US4123199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor-shaft assembly
Assignee: Toshiba Corp
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Filing: 1977-03-25
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Granted: 1978-10-31
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Expires: 1997-03-25
Abstract
Abstract A rotor-shaft assembly comprising a ceramic turbine rotor, a metal shaft and a metal connector disposed between the rotor and the shaft. The metal connector is fixed to the rotor by some suitable means and coupled with the metal shaft by mutual engagement of teeth provided at the ends of the connector and the shaft.
Inventors
- 👤 Syogo Shimizu
- 👤 Toshihiko Ochiai
- 👤 Masato Sakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:11
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/06; F01D5/066; F01D5/12; F01D5/28; F01D5/284; F01D5/34
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
66 words
A rotor-shaft assembly comprising: a ceramic turbine rotor; a connector member comprising a columnar or cylindrical body of metal having first and second ends, the first end being co-axially joined to the ceramic turbine rotor; and a metal shaft co-axially joined to the second end of the connector member by mutual engagement of teeth provided at the ends of the connector member and the metal shaft.
Claim 2
Dependent Claim
66 words
A rotor-shaft assembly comprising: a ceramic turbine rotor; a connector member comprising a columnar or cylindrical body of metal having first and second ends, the first end being co-axially joined to the ceramic turbine rotor; and a metal shaft co-axially joined to the second end of the connector member by mutual engagement of teeth provided at the ends of the connector member and the metal shaft.
Claim 3
Dependent Claim
36 words
The rotor-shaft assembly according to claim 1, wherein the ceramic turbine rotor is provided with a projection integral and co-axial with the rotor and the first end of the connector member is coupled with the projection.
Claim 4
Dependent Claim
19 words
The rotor-shaft assembly according to claim 2, wherein the projection of the rotor is of a truncated cone shape.
Claim 5
Dependent Claim
36 words
The rotor-shaft assembly according to claim 3, wherein the first end of the connector member is provided with a groove and the truncated cone-shaped projection of the rotor is coupled with the groove by thermal insertion.
Claim 6
Dependent Claim
20 words
The rotor-shaft assembly according to claim 4, wherein the turbine rotor is made of silicon nitride, silicon carbide or SIALON.
Claim 7
Dependent Claim
21 words
The rotor-shaft assembly according to claim 4, wherein the connector member and the shaft are each made of a heat-resistant metal.
Claim 8
Dependent Claim
14 words
The rotor-shaft assembly according to claim 6, wherein the heat-resistant metal is chromium-molybdenum steel.
References Cited (Backward Citations)
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CH225640A
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FR902004A
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US2479057A
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US2769611A
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US3745628A
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US3999376A
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US3916495A
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US4011737A
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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) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |