US4414461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser pumped superconductive energy storage system
Assignee: United States Department of the Navy
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Filing: 1981-08-21
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Granted: 1983-11-08
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Expires: 2001-08-21
Abstract
Abstract A superconductive energy storage system comprising a magnetic field surrounding a superconducting coil having large currents circulating therein, cooling said coil to superconducting temperatures, starting said circulating current in said superconducting coil inductively by a small primer coil, transmitting additional energy into said energy storage system utilizing a laser beam, and retaining said energy in said energy storage system until needed.
Inventors
- 👤 Alfred A. Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:18
CPC Classifications
H; H01; H01F; H01F6/00; H01F6/006; H02; H02J; H02J15/00; Y; Y02; Y02E; Y02E40/00; Y02E40/60; Y10; Y10S; Y10S336/00; Y10S336/01; Y10S505/00; Y10S505/825; Y10S505/869; Y10S505/87
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
169 words
A superconductive energy storage system comprising: a superconducting coil means for carrying large currents in a closed loop; refrigerating means for cooling said coil means to superconducting temperatures, including a dewar containing a liquid helium bath for receiving said coil means and a liquid helium refrigerator for replenishing liquid helium in said bath; primer means for inductively starting a circulating current in said coil means; a laser means for transmitting additional energy into said coil means; an optical window in said dewar through which light from said laser passes; an optical absorber mounted on said coil means for receiving light energy from said laser means to increase the current in said coil; and retrieval means for retrieving energy from said coil means; whereby said laser means is operated at a frequency below the critical frequency of said superconducting coil so that when said laser means shines on said optical absorber, the energy of said storage system and said current in said coil increase without causing normalization of the system.
Claim 2
Dependent Claim
169 words
A superconductive energy storage system comprising: a superconducting coil means for carrying large currents in a closed loop; refrigerating means for cooling said coil means to superconducting temperatures, including a dewar containing a liquid helium bath for receiving said coil means and a liquid helium refrigerator for replenishing liquid helium in said bath; primer means for inductively starting a circulating current in said coil means; a laser means for transmitting additional energy into said coil means; an optical window in said dewar through which light from said laser passes; an optical absorber mounted on said coil means for receiving light energy from said laser means to increase the current in said coil; and retrieval means for retrieving energy from said coil means; whereby said laser means is operated at a frequency below the critical frequency of said superconducting coil so that when said laser means shines on said optical absorber, the energy of said storage system and said current in said coil increase without causing normalization of the system.
Claim 3
Independent Claim
84 words
A method of storing energy comprising the steps of: magnetically inducing a current in a superconductive storage coil by means of a magnetic primer; turning off said magnetic primer; shining laser light of a frequency below the critical frequency of said coil onto an optical absorber so that the energy of the coil increases without causing normalization to produce additional current in said coil; storing said coil cryogenically to retain the current flowing in said coil; and retrieving the energy stored in said coil.
Claim 4
Independent Claim
84 words
A method of storing energy comprising the steps of: magnetically inducing a current in a superconductive storage coil by means of a magnetic primer; turning off said magnetic primer; shining laser light of a frequency below the critical frequency of said coil onto an optical absorber so that the energy of the coil increases without causing normalization to produce additional current in said coil; storing said coil cryogenically to retain the current flowing in said coil; and retrieving the energy stored in said coil.
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) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |