Patent US3272290A successfully refreshed from Google Patents.
US3272290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic device
Assignee: Globe Industries Inc
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Filing: 1957-10-31
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Granted: 1966-09-13
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Expires: 1977-10-31
Abstract
No abstract record available.
Inventors
- 👤 Louis H Goddard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:45
CPC Classifications
F; F16; F16D; F16D67/00; F16D67/02; F16D67/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
AN ELECTROMAGNETIC CLUTCH ASSEMBLY INCLUDING MAGNETIC CIRCUIT MEANS COMPRISING A COIL ADAPTED TO CARRY CURRENT THERETHROUGH, A DRIVING CLUTCH MEMBER AND A DRIVEN CLUTCH MEMBER MAGNETICALLY LINKED WITH SAID COIL SO THAT THE CLUTCHING FACES OF SAID MEMBERS ARE IN THE FLUX PATH OF THE COIL, A DRIVEN SHAFT FIXED AGAINST AXIAL MOVEMENT, A BUSHING MOUNTED ON SAID SHAFT, SAID DRIVING AND DRIVEN CLUTCH MEMBERS HAVING AT LEAST A PORTION OF EACH THEREOF OF MAGNETIC MATERIAL, SAID DRIVEN CLUTCH MEMBER BEING IN THE FORM OF A SLEEVE MOUNTED ON SAID BUSHING AND HAVING A LOW MOMENT OF INERTIA CONSISTENT WITH OBTAINING A HIGH RELATIVE FLUX PATH, AND THEREBY A HIGH TORQUE, AND BEING COUPLED TO SAID DRIVEN SHAFT FOR ROTATIONAL MOVEMENT THEREWITH BUT BEING FREE FOR TRANSLATIONAL MOVEMENT WITH RESPECT THERETO.
Claim 2
Dependent Claim
131 words
AN ELECTROMAGNETIC CLUTCH ASSEMBLY INCLUDING MAGNETIC CIRCUIT MEANS COMPRISING A COIL ADAPTED TO CARRY CURRENT THERETHROUGH, A DRIVING CLUTCH MEMBER AND A DRIVEN CLUTCH MEMBER MAGNETICALLY LINKED WITH SAID COIL SO THAT THE CLUTCHING FACES OF SAID MEMBERS ARE IN THE FLUX PATH OF THE COIL, A DRIVEN SHAFT FIXED AGAINST AXIAL MOVEMENT, A BUSHING MOUNTED ON SAID SHAFT, SAID DRIVING AND DRIVEN CLUTCH MEMBERS HAVING AT LEAST A PORTION OF EACH THEREOF OF MAGNETIC MATERIAL, SAID DRIVEN CLUTCH MEMBER BEING IN THE FORM OF A SLEEVE MOUNTED ON SAID BUSHING AND HAVING A LOW MOMENT OF INERTIA CONSISTENT WITH OBTAINING A HIGH RELATIVE FLUX PATH, AND THEREBY A HIGH TORQUE, AND BEING COUPLED TO SAID DRIVEN SHAFT FOR ROTATIONAL MOVEMENT THEREWITH BUT BEING FREE FOR TRANSLATIONAL MOVEMENT WITH RESPECT THERETO.
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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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |