US3406245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric cable installations
Assignee: Balfour Beatty PLC
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Filing: 1966-08-23
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Granted: 1968-10-15
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Expires: 1986-08-23
Abstract
No abstract record available.
Inventors
- 👤 Watkins Roland Howard Weir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:54
CPC Classifications
H; H02; H02G; H02G9/00; H02G9/06; H01; H01B; H01B7/00; H01B7/17; H01B7/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
AN ELECTRIC CABLE INSTALLATIONS IN WHICH COOLED SECTION OF CABLE, CONSISTING OF A PLURALITY OF SUCCESSIVE INDIVIDUALLY COOLED LENGTHS OF CABLE, IS PROVIDED WITH COOLING MEANS COMPRISING: (A) AT LEAST ONE PRIMARY COOLING FLUID DUCT ASSOCIATED WITH AND PASSING ALONG EACH INDIVIDUALLY COOLED LENGTH OF CABLE TO EXTRACT HEAT THEREFROM, (B) MEANS FOR CIRCULATING COOLING FLUID THROUGH SAID DUCTS COMPRISING AT LEAST ONE RETURN PIPE INTERCONNECTING THE ENDS OF EACH OF THE PRIMARY COOLING FLUID DUCTS, (C) A SECONDARY COOLING FLUID DUCT EXTENDING ALONG AT LEAST A MAJOR PART OF THE COOLED SECTION OF CABLE, (D) A PLURALITY OF PRIMARY COOLING FLUID ARRANGED TO TRANSFER HEAT FROM THE PRIMARY COOLING FLUID IN THE RETURN PIPES TO THE SECONDARY COOLING FLUID IN THE SECONDARY FLUID DUCT, (E) MEANS FOR CIRCULATING THE SECONDARY FLUID COMPRISING A SECONDARY COOLING FLUID RETURN PIPE INTERCONNECTING THE ENDS OF THE SECONDARY COOLING FLUID DUCT, AND (F) AT LEAST ONE SECONDARY HEAT EXCHANGER CONNECTED IN THE SECONARY FLUID CIRCUIT TO EXTRACT HEAT FROM THE SECONDARY COOLING FLUID.
Claim 2
Dependent Claim
170 words
AN ELECTRIC CABLE INSTALLATIONS IN WHICH COOLED SECTION OF CABLE, CONSISTING OF A PLURALITY OF SUCCESSIVE INDIVIDUALLY COOLED LENGTHS OF CABLE, IS PROVIDED WITH COOLING MEANS COMPRISING: (A) AT LEAST ONE PRIMARY COOLING FLUID DUCT ASSOCIATED WITH AND PASSING ALONG EACH INDIVIDUALLY COOLED LENGTH OF CABLE TO EXTRACT HEAT THEREFROM, (B) MEANS FOR CIRCULATING COOLING FLUID THROUGH SAID DUCTS COMPRISING AT LEAST ONE RETURN PIPE INTERCONNECTING THE ENDS OF EACH OF THE PRIMARY COOLING FLUID DUCTS, (C) A SECONDARY COOLING FLUID DUCT EXTENDING ALONG AT LEAST A MAJOR PART OF THE COOLED SECTION OF CABLE, (D) A PLURALITY OF PRIMARY COOLING FLUID ARRANGED TO TRANSFER HEAT FROM THE PRIMARY COOLING FLUID IN THE RETURN PIPES TO THE SECONDARY COOLING FLUID IN THE SECONDARY FLUID DUCT, (E) MEANS FOR CIRCULATING THE SECONDARY FLUID COMPRISING A SECONDARY COOLING FLUID RETURN PIPE INTERCONNECTING THE ENDS OF THE SECONDARY COOLING FLUID DUCT, AND (F) AT LEAST ONE SECONDARY HEAT EXCHANGER CONNECTED IN THE SECONARY FLUID CIRCUIT TO EXTRACT HEAT FROM THE SECONDARY COOLING FLUID.
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) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |