Patent US3693126A successfully refreshed from Google Patents.
US3693126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling means for lifting magnet
Assignee: COOPER SERVICES 1001 FANNIN HOUSTON TEXAS 77002 A CORP OF DE
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Filing: 1971-02-01
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Granted: 1972-09-19
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Expires: 1991-02-01
Abstract
Abstract A magnet for lifting high temperature materials is disclosed as having a metal case, an electrical winding enclosed within the metal case for producing a magnetic field and thermal insulation surrounding the winding and separating it from the metal case. A cooling medium is circulated about the winding within the thermal insulation by a cooling means which may include a pump and hose carrying the cooling medium and connecting the pump to the metal case. The thermal insulation serves to prevent the cooling medium from attempting to cool the metal case.
Inventors
- 👤 James P Rybak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:59
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/20; H01F7/206
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
83 words
An electro-magnet for lifting high temperature material comprising an electrical winding connected to a power source and having a maximum allowable operating temperature, a metal case enclosing the winding and having a temperature exceeding said maximum winding temperature during normal operation of the lifting magnet, means for cooling said electrical winding including a cooling medium adjacent the winding, and thermal insulation material enveloping said winding and said cooling medium, whereby heat in said case is inhibited from reaching said cooling medium and winding.
Claim 2
Dependent Claim
83 words
An electro-magnet for lifting high temperature material comprising an electrical winding connected to a power source and having a maximum allowable operating temperature, a metal case enclosing the winding and having a temperature exceeding said maximum winding temperature during normal operation of the lifting magnet, means for cooling said electrical winding including a cooling medium adjacent the winding, and thermal insulation material enveloping said winding and said cooling medium, whereby heat in said case is inhibited from reaching said cooling medium and winding.
Claim 3
Dependent Claim
41 words
The combination according to claim 1 wherein said material has a temperature exceeding said maximum winding temperature and the metal case engages said material during operation of the lifting magnet whereby heat is transferred from said material to the metal case.
Claim 4
Dependent Claim
41 words
The combination according to claim 1 wherein said cooling means includes tubing positioned in heat conducting relationship with said winding and means positioned external of said metal casing and connected to the tubing for circulating said cooling medium through the tubing.
Claim 5
Dependent Claim
67 words
The combination according to claim 1 wherein said metal case includes a pair of pole shoes engaging said high temperature material during operation of the lifting magnet and said cooling means includes pump means located remotely from the metal case for circulating the cooling medium through said case and hose means connected between the metal case and pump means, said cooling medium being in said hose means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |