US4532445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor of superconductive generator
Assignee: Mitsubishi Electric Corp
•
Filing: 1984-02-02
•
Granted: 1985-07-30
•
Expires: 2004-02-02
Abstract
Abstract A torque tube is firmly connected in a damper and a thickness of the damper is more than two times of a thickness of the torque tube in a rotor of a superconductive generator. The rotor has excellent thermal and mechanical characteristics. The damper and the torque tube is formed in one piece and the torque tube is provided with a coil fitting part.
Inventors
- 👤 Masatami Iwamoto
- 👤 Shiro Nakamura
- 👤 Masayuki Miyazaki
- 👤 Sumio Yoshioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:32
CPC Classifications
H; H02; H02K; H02K55/00; H02K55/02; H02K55/04; Y; Y02; Y02E; Y02E40/00; Y02E40/60; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/876; Y10S505/877
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
153 words
In a rotor of a superconductive generator having a torque tube in a damper, a shaft and a superconductive coil fitted to said torque tube, an improvement comprising: said damper and said torque tube being formed in one piece without a movable part by directly and firmly connecting said damper and said torque tube to each other at each end of said torque tube by one of welding and bolting said damper to said torque tube; said damper having a thickness at least two times the thickness of said torque tube such that the ratio of thermal stress to resistance in said torque tube is at least as great as that in said damper; said torque tube having a heat insulating part; and said torque tube having a coil fitting part wherein a thickness of said coil fitting part of said torque tube is thicker than a thickness of said heat insulating part.
Claim 2
Dependent Claim
153 words
In a rotor of a superconductive generator having a torque tube in a damper, a shaft and a superconductive coil fitted to said torque tube, an improvement comprising: said damper and said torque tube being formed in one piece without a movable part by directly and firmly connecting said damper and said torque tube to each other at each end of said torque tube by one of welding and bolting said damper to said torque tube; said damper having a thickness at least two times the thickness of said torque tube such that the ratio of thermal stress to resistance in said torque tube is at least as great as that in said damper; said torque tube having a heat insulating part; and said torque tube having a coil fitting part wherein a thickness of said coil fitting part of said torque tube is thicker than a thickness of said heat insulating part.
Claim 3
Dependent Claim
42 words
A rotor of a superconductive generator according to claim 1 further comprising: a flange rotatable with said shaft in one unit with said flange being connected by a connection means to said one piece formed by said damper and said torque tube.
Claim 4
Dependent Claim
18 words
A rotor of superconductive generator according to claim 1, wherein said one of welding and bolting comprises welding.
Claim 5
Dependent Claim
15 words
A rotor of superconductive generator according to claim 2, wherein said connection means comprises welding.
Claim 6
Dependent Claim
20 words
A rotor of a superconductive generator according to claim 1, wherein said one of said welding and bolting comprises bolting.
Claim 7
Dependent Claim
17 words
A rotor of a superconductive generator according to claim 2, wherein said connection means comprises a bolt.
Claim 8
Dependent Claim
24 words
A rotor of a superconductive generator according to claim 1, wherein said damper and said torque tube are made of titanium and titanium alloy.
Claim 9
Dependent Claim
26 words
A rotor of a superconductive generator according to claim 2, wherein said damper and said torque tube are made of one of titanium and titanium alloy.
Claim 10
Dependent Claim
26 words
A rotor of a superconductive generator according to claim 3, wherein said damper and said torque tube are made of one of titanium and titanium alloy.
Claim 11
Dependent Claim
26 words
A rotor of a superconductive generator according to claim 4, wherein said damper and said torque tube are made of one of titanium and titanium alloy.
Claim 12
Dependent Claim
26 words
A rotor of a superconductive generator according to claim 5, wherein said damper and said torque tube are made of one of titanium and titanium alloy.
Claim 13
Dependent Claim
26 words
A rotor of a superconductive generator according to claim 6, wherein said damper and said torque tube are made of one of titanium and titanium alloy.
Claim 14
Dependent Claim
51 words
A rotor of a superconductive generator according to claim 2, further comprising: said torque tube having a heat insulating part; and said torque tube having a coil fitting part wherein a thickness of said coil fitting part of said torque tube is thicker than a thickness of said heat insulating part.
Claim 15
Dependent Claim
21 words
A rotor of a superconductive generator according to claim 1, wherein said superconductive coil is placed outside of said torque tube.
Claim 16
Dependent Claim
23 words
A rotor of a superconductive generator according to claim 1 wherein said damper and said torque tube are made of a titanium alloy.
References Cited (Backward Citations)
US3679920A
Cited
US3742265A
Cited
US4063122A
Cited
US3956648A
Cited
US4085343A
Cited
US4042846A
Cited
US4076988A
Cited
US4152609A
Cited
US4267473A
Cited
US4176291A
Cited
US4295068A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-29 | 1989-01-28 | 1989-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-29 | 1993-01-28 | 1993-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-29 | 1997-01-28 | 1997-07-30 | $7700.00 | Window Closed / Lapsed |