US3079191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent magnet lifting device
Assignee: O S WALKER COMPANY Inc
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Filing: 1960-02-12
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Granted: 1963-02-26
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Expires: 1980-02-12
Abstract
No abstract record available.
Inventors
- 👤 John N Engelsted
- 👤 Baner Eduard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:47
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/02; H01F7/0231; H01F7/0252; H01F7/0257; H01F7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
IN A PERMANENT MAGNET LIFTING DEVICE OF THE TYPE HAVING A WORK CONTACTING SURFACE FOR ENGAGING WORK TO BE LIFTED BY THE DEVICE; A PERMANENT MAGNET POLARIZED IN A DIRECTION EXTENDING PARALLEL TO SAID SURFACE, SAID SURFACE INCLUDING SPACED APART POLE FACES RESPECTIVELY ASSOCIATED WITH THE POLES OF SAID MAGNET, A FLUX CONDUCTING MEMBER ASSOCIATED WITH ONE OF THE POLE FACES AND THE RESPECTIVELY ASSOCIATED ONE OF THE POLES OF THE MAGNET AND MOUNTED FOR MOVEMENT GENERALLY AT RIGHT ANGLES TO SAID SURFACE AND INTO AND OUT OF FLUX CONDUCTIVE RELATIONSHIP WITH SAID ONE OF THE POLE FACES, AND A FLUX SHUNTING MEMBER IN FLUX CONDUCTIVE RELATION WITH THE OTHER POLE OF SAID MAGNET AND DISPOSED ON THE SIDE OF SAID MAGNET OPPOSITE SAID SURFACE AND IN THE PATH OF MOVEMENT OF SAID FLUX CONDUCTING MEMBER, SAID SHUNTING MEMBER FORMING A PORTION OF THE MAGNETIC CIRCUIT ONLY WHEN IN SHUNTING RELATION BETWEEN SAID FLUX CONDUCTING MEMBER AND SAID OTHER POLE OF THE MAGNET IN RESPONSE TO MOVEMENT OF SAID FLUX CONDUCTING MEMBER AWAY FROM SAID SURFACE.
Claim 2
Dependent Claim
176 words
IN A PERMANENT MAGNET LIFTING DEVICE OF THE TYPE HAVING A WORK CONTACTING SURFACE FOR ENGAGING WORK TO BE LIFTED BY THE DEVICE; A PERMANENT MAGNET POLARIZED IN A DIRECTION EXTENDING PARALLEL TO SAID SURFACE, SAID SURFACE INCLUDING SPACED APART POLE FACES RESPECTIVELY ASSOCIATED WITH THE POLES OF SAID MAGNET, A FLUX CONDUCTING MEMBER ASSOCIATED WITH ONE OF THE POLE FACES AND THE RESPECTIVELY ASSOCIATED ONE OF THE POLES OF THE MAGNET AND MOUNTED FOR MOVEMENT GENERALLY AT RIGHT ANGLES TO SAID SURFACE AND INTO AND OUT OF FLUX CONDUCTIVE RELATIONSHIP WITH SAID ONE OF THE POLE FACES, AND A FLUX SHUNTING MEMBER IN FLUX CONDUCTIVE RELATION WITH THE OTHER POLE OF SAID MAGNET AND DISPOSED ON THE SIDE OF SAID MAGNET OPPOSITE SAID SURFACE AND IN THE PATH OF MOVEMENT OF SAID FLUX CONDUCTING MEMBER, SAID SHUNTING MEMBER FORMING A PORTION OF THE MAGNETIC CIRCUIT ONLY WHEN IN SHUNTING RELATION BETWEEN SAID FLUX CONDUCTING MEMBER AND SAID OTHER POLE OF THE MAGNET IN RESPONSE TO MOVEMENT OF SAID FLUX CONDUCTING MEMBER AWAY FROM SAID SURFACE.
References Cited (Backward Citations)
US2915682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |