Patent US3216542A successfully refreshed from Google Patents.
US3216542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic fluid clutch with nonconductive spacer
Assignee: Potter Instrument Co Inc
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Filing: 1963-11-07
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Granted: 1965-11-09
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Expires: 1983-11-07
Abstract
No abstract record available.
Inventors
- 👤 George E Comstock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:34
CPC Classifications
F; F16; F16D; F16D37/00; F16D37/02; F16D2037/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A MAGNETICALLY OPERABLE CLUTCH COMPRISING, A ROTATABLY MOUNTED DRIVEN CLUTCH MEMBER, FIRST AND SECOND ROTATABLY MOUNTED DRIVE MEMBERS, MOUNTED ON OPPOSITE SIDES OF SAID DRIVEN CLUTCH MEMBER, A TORQUE TRANSMITTING CONNECTION INCLUDING A PLURALITY OF NON-MAGNETIC RETAINER PINS EXTENDING BETWEEN AND SECURED TO EACH OF SAID DRIVE MEMBERS FOR COUPLING SAID FIRST AND SECOND DRIVE MEMBERS TOGETHER, A NONCONDUCTIVE SPACER RING POSITIONED BETWEEN SAID FIRST AND SECOND DRIVE MEMBERS AND ENCLOSING SAID DRIVEN MEMBER, MAGNETIC PARTICLES POSITIONED BETWEEN SAID DRIVEN MEMBER AND SAID FIRST AND SECOND DRIVE MEMBERS, AND MEANS MOUNTED SEPARATE FROM SAID DRIVE AND DRIVEN MEMBERS TO ESTABLISH A MAGNETIC FIELD ACROSS SAID DRIVE AND DRIVEN MEMBERS TO LOCK SAID PARTICLES INTO CHAINS COUPLING SAID DRIVE AND DRIVEN MEMBERS.
Claim 2
Dependent Claim
121 words
A MAGNETICALLY OPERABLE CLUTCH COMPRISING, A ROTATABLY MOUNTED DRIVEN CLUTCH MEMBER, FIRST AND SECOND ROTATABLY MOUNTED DRIVE MEMBERS, MOUNTED ON OPPOSITE SIDES OF SAID DRIVEN CLUTCH MEMBER, A TORQUE TRANSMITTING CONNECTION INCLUDING A PLURALITY OF NON-MAGNETIC RETAINER PINS EXTENDING BETWEEN AND SECURED TO EACH OF SAID DRIVE MEMBERS FOR COUPLING SAID FIRST AND SECOND DRIVE MEMBERS TOGETHER, A NONCONDUCTIVE SPACER RING POSITIONED BETWEEN SAID FIRST AND SECOND DRIVE MEMBERS AND ENCLOSING SAID DRIVEN MEMBER, MAGNETIC PARTICLES POSITIONED BETWEEN SAID DRIVEN MEMBER AND SAID FIRST AND SECOND DRIVE MEMBERS, AND MEANS MOUNTED SEPARATE FROM SAID DRIVE AND DRIVEN MEMBERS TO ESTABLISH A MAGNETIC FIELD ACROSS SAID DRIVE AND DRIVEN MEMBERS TO LOCK SAID PARTICLES INTO CHAINS COUPLING SAID DRIVE AND DRIVEN MEMBERS.
References Cited (Backward Citations)
US2575360A
Cited
US2917707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |