US3639673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertically disposed isolated phase bus
Assignee: Hitachi Ltd
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Filing: 1970-08-05
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Granted: 1972-02-01
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Expires: 1990-08-05
Abstract
Abstract Vertically disposed isolated phase bus whose length reaches to hundreds of yards including a conductor bar, a sheath concentrically enclosing the bar so as to define an annular space therebetween substantially uninterrupted over the whole length of the bar and supporting insulators supporting the bar on the sheath, wherein substantially uninterrupted successive small turbulent free-convection flows are formed along the longitudinal direction of the annular space, when the bar conducts electric current.
Inventors
- 👤 Yoshio Fujisaki
- 👤 Akira Suzuoki
- 👤 Eiichi Ishibashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:24
CPC Classifications
H; H02; H02G; H02G9/00; H02G9/06; H02G5/00; H02G5/06; H02G5/061
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
100 words
An isolated phase bus comprising: substantially vertically disposed conductor means; casing means enclosing said conductor means centrally so as to define an annular space therebetween substantially uninterrupted over the whole length of said conductor means; supporting means located between said conductor means and said casing means supporting said conductor means on said casing means without restricting said annular space; sealing means disposed at both eNds of said casing means for sealing said annular space; wherein substantially uninterrupted successive small turbulent free-convection flows are formed along the longitudinal direction of said annular space when said conducting means is carrying electric current.
Claim 2
Dependent Claim
100 words
An isolated phase bus comprising: substantially vertically disposed conductor means; casing means enclosing said conductor means centrally so as to define an annular space therebetween substantially uninterrupted over the whole length of said conductor means; supporting means located between said conductor means and said casing means supporting said conductor means on said casing means without restricting said annular space; sealing means disposed at both eNds of said casing means for sealing said annular space; wherein substantially uninterrupted successive small turbulent free-convection flows are formed along the longitudinal direction of said annular space when said conducting means is carrying electric current.
Claim 3
Dependent Claim
32 words
An isolated phase bus, dependent on claim 1, wherein the ratio of the length of said conducting means to the distance between said conducting means and said casing means is above 200.
Claim 4
Dependent Claim
21 words
An isolated phase bus, dependent on claim 1, wherein said supporting means is the sole means disposed in said annular space.
Claim 5
Dependent Claim
39 words
An isolated phase bus, dependent on claim 3, wherein said supporting means includes a plurality of spaced insulating support arms, each support arm being connected between a point on said casing means and a point on said conductor means.
Claim 6
Dependent Claim
107 words
An isolated phase bus comprising: conductor means having a length in excess of several meters being substantially vertically disposed along the entire length thereof; casing means enclosing said conductor means centrally so as to define an annular space therebetween; and means for ensuring substantially uninterrupted successive small turbulent free-condition flow along the longitudinal direction of said annular space when said conductor means is carrying the electric current, including supporting means located between said conductor means and said casing means supporting said conductor means on said casing means without restricting said annular space; and sealing means disposed at both ends of said casing means sealing said annular space.
Claim 7
Dependent Claim
107 words
An isolated phase bus comprising: conductor means having a length in excess of several meters being substantially vertically disposed along the entire length thereof; casing means enclosing said conductor means centrally so as to define an annular space therebetween; and means for ensuring substantially uninterrupted successive small turbulent free-condition flow along the longitudinal direction of said annular space when said conductor means is carrying the electric current, including supporting means located between said conductor means and said casing means supporting said conductor means on said casing means without restricting said annular space; and sealing means disposed at both ends of said casing means sealing said annular space.
Claim 8
Dependent Claim
32 words
An isolated phase bus according to claim 5, wherein the ratio of the length of said conducting means to the distance between said conducting means and said casing means is above 200.
Claim 9
Dependent Claim
39 words
An isolated phase bus according to claim 6, wherein said supporting means includes a plurality of spaced insulating support arms, each support arm being connected between a point on said casing means and a point on said conductor means.
Claim 10
Dependent Claim
61 words
An isolated phase bus according to claim 7, wherein said phase bus is located in a vertical shaft, disposed beneath the surface of the earth and is connected at its respective ends, to a transmitter and generator, one of which is located at the surface of the earth and one of which is disposed at the bottom of said vertical shaft.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |