US2736409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic fluid mixture clutch containing iron and nickel particles
Assignee: Vickers Inc
•
Filing: 1950-11-16
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Granted: 1956-02-28
•
Expires: 1970-11-16
Abstract
No abstract record available.
Inventors
- 👤 Frank G Logan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:43
CPC Classifications
F; F16; F16D; F16D37/00; F16D37/02; F16D2037/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A MAGNETIC COUPLING DEVICE COMPRISING A PAIR OF SPACED RELATIVELY MOVABLE COUPLING MEMBERS DEFINING A GAP THEREBETWEEN, MEANS FOR ESTABLISHING A MAGNETIC FIELD ACROSS SAID GAP, AND MAGNETIC PARTICLES IN SAID GAP AND RESPONSIVE TO SAID FIELD FOR ESTABLISHING A FORCE-TRANSMITTING BOND BETWEEN SAID MEMBERS, WHEREBY MOVEMENT OF ONE MEMBER AT LEAST TENDS TO CAUSE MOVEMENT OF THE OTHER MEMBER, SAID PARTICLES INCLUDING DISCRETE NICKEL PARTICLES AND DISCRETE IRON PARTICLES.
Claim 2
Dependent Claim
70 words
A MAGNETIC COUPLING DEVICE COMPRISING A PAIR OF SPACED RELATIVELY MOVABLE COUPLING MEMBERS DEFINING A GAP THEREBETWEEN, MEANS FOR ESTABLISHING A MAGNETIC FIELD ACROSS SAID GAP, AND MAGNETIC PARTICLES IN SAID GAP AND RESPONSIVE TO SAID FIELD FOR ESTABLISHING A FORCE-TRANSMITTING BOND BETWEEN SAID MEMBERS, WHEREBY MOVEMENT OF ONE MEMBER AT LEAST TENDS TO CAUSE MOVEMENT OF THE OTHER MEMBER, SAID PARTICLES INCLUDING DISCRETE NICKEL PARTICLES AND DISCRETE IRON PARTICLES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |