US4448042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coolant supply and discharge device for superconductive rotor
Assignee: Hitachi Ltd
•
Filing: 1982-10-29
•
Granted: 1984-05-15
•
Expires: 2002-10-29
Abstract
Abstract A coolant supply and discharge device for a superconductive rotor including a gaseous coolant withdrawing tube for withdrawing a gaseous coolant located at an end portion of fixed casing enclosing an end portion of the rotor and supporting a coolant feed tube. The withdrawing tube is constituted to withdraw a predetermined amount of gaseous coolant produced in a clearance between the coolant feed tube and a coolant inlet tube located within a rotor shaft to a coolant sump located outside, to avoid introduction of heat into the feed tube from outside.
Inventors
- 👤 Kiyoshi Yamaguchi
- 👤 Naoki Maki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:41
CPC Classifications
H; H02; H02K; H02K55/00; H02K55/02; H02K55/04; F; F17; F17C; F17C9/00; F17C9/02; H02K9/00; H02K9/19; H02K9/193; Y; Y02; Y02E; Y02E40/00; Y02E40/60; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/888; Y10S505/892
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
175 words
A coolant supply and discharge device for a superconductive rotor comprising: an inlet tube connected to an end portion of the superconductive rotor to introduce a coolant in a liquid state into said superconductive rotor; an inner discharge tube and an outer discharge tube located at the outer periphery of said inlet tube to recover the coolant in a gaseous state; a fixed casing located at the outer periphery of said outer discharge tube through bearings in a manner to enclose said inlet tube and said inner and outer discharge tubes; a feed tube extending into said fixed casing and having an open end portion located in said inlet tube to feed the coolant in the liquid state into the inlet tube; and withdrawing means located at an end portion of said fixed casing to withdraw a predetermined amount of gaseous coolant produced in a clearance between said feed tube and said inlet tube to a coolant sump located outside said fixed casing through a space in said fixed casing communicating with said inlet tube.
Claim 2
Dependent Claim
175 words
A coolant supply and discharge device for a superconductive rotor comprising: an inlet tube connected to an end portion of the superconductive rotor to introduce a coolant in a liquid state into said superconductive rotor; an inner discharge tube and an outer discharge tube located at the outer periphery of said inlet tube to recover the coolant in a gaseous state; a fixed casing located at the outer periphery of said outer discharge tube through bearings in a manner to enclose said inlet tube and said inner and outer discharge tubes; a feed tube extending into said fixed casing and having an open end portion located in said inlet tube to feed the coolant in the liquid state into the inlet tube; and withdrawing means located at an end portion of said fixed casing to withdraw a predetermined amount of gaseous coolant produced in a clearance between said feed tube and said inlet tube to a coolant sump located outside said fixed casing through a space in said fixed casing communicating with said inlet tube.
Claim 3
Dependent Claim
62 words
A coolant supply and discharge device for a superconductive rotor as claimed in claim 1, wherein said withdrawing means comprises a gaseous coolant withdrawing tube located betwen the end portion of said fixed casing communicating with said space in said fixed casing and said coolant sump and having a sump and a flow resistance adjusting valve connected in parallel with each other.
References Cited (Backward Citations)
US3626717A
Cited
US3760603A
Cited
US3845639A
Cited
US4079273A
Cited
US4101793A
Cited
US4056745A
Cited
US4207745A
Cited
JPS5426411A
Cited
JPS53133710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |