Patent US3249184A successfully refreshed from Google Patents.
US3249184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-magnetic fluid clutch
Assignee: Eaton Corp
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Filing: 1963-06-03
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Granted: 1966-05-03
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Expires: 1983-06-03
Abstract
No abstract record available.
Inventors
- 👤 Simons Homer Charles
- 👤 Jr Andrew S Gill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:07
CPC Classifications
F; F16; F16D; F16D37/00; F16D37/02; F16D2037/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
AN ELECTROMAGNETIC DEVICE HAVING A PATH FOR MAGNETIC FLUX AND COMPRISING, FIELD MEANS INCLUDING A FIELD COIL AND MEANS PROVIDING A PATH FOR MAGNETIC FLUX PRODUCED BY THE FIELD COIL INCLUDING POLE MEMBERS EACH OF WHICH INCLUDES A POLE TIP SEPARATED FROM THE POLE TIP OF THE OTHER POLE MEMBER BY AN ANNULAR AIR GAP AND A POLE FACE AREA LOCATED ON OPPOSITE SIDES OF SAID AIR GAP IN THE FLUX PATH, AN ADJACENT FIRST ROTOR MEMBER SPACED FROM SAID POLE FACE AREAS AND ENCIRCLING SAID POLE FACE AREAS, A SECOND ROTOR MEMBER SPACED FROM SAID FIRST ROTOR AND ENCIRCLING SAID FIRST ROTOR MEMBER, PROVIDING A GAP THEREBETWEEN, MAGNETIC MATERIAL IN SAID GAP RESPONSIVE TO MAGNETIC FLUX FOR DRIVINGLY CONNECTING SAID ROTOR MEMBERS, A CENTRAL ANNULAR FLUX CONTROLLING GROOVE FORMED IN ONE OF SAID ROTOR MEMBERS AND EXTENDING COEXTENSIVE WITH SAID CENTRAL AIR GAP AND COEXTENSIVE WITH A PORTION OF SAID POLE FACE AREAS ON THE OPPOSITE AXIAL SIDES OF SAID AIR GAP, A FORWARD FLUX CONTROLLING GROOVE IN SAID ONE OF SAID ROTOR MEMBERS AND HAVING A PORTION
Claim 2
Dependent Claim
179 words
AN ELECTROMAGNETIC DEVICE HAVING A PATH FOR MAGNETIC FLUX AND COMPRISING, FIELD MEANS INCLUDING A FIELD COIL AND MEANS PROVIDING A PATH FOR MAGNETIC FLUX PRODUCED BY THE FIELD COIL INCLUDING POLE MEMBERS EACH OF WHICH INCLUDES A POLE TIP SEPARATED FROM THE POLE TIP OF THE OTHER POLE MEMBER BY AN ANNULAR AIR GAP AND A POLE FACE AREA LOCATED ON OPPOSITE SIDES OF SAID AIR GAP IN THE FLUX PATH, AN ADJACENT FIRST ROTOR MEMBER SPACED FROM SAID POLE FACE AREAS AND ENCIRCLING SAID POLE FACE AREAS, A SECOND ROTOR MEMBER SPACED FROM SAID FIRST ROTOR AND ENCIRCLING SAID FIRST ROTOR MEMBER, PROVIDING A GAP THEREBETWEEN, MAGNETIC MATERIAL IN SAID GAP RESPONSIVE TO MAGNETIC FLUX FOR DRIVINGLY CONNECTING SAID ROTOR MEMBERS, A CENTRAL ANNULAR FLUX CONTROLLING GROOVE FORMED IN ONE OF SAID ROTOR MEMBERS AND EXTENDING COEXTENSIVE WITH SAID CENTRAL AIR GAP AND COEXTENSIVE WITH A PORTION OF SAID POLE FACE AREAS ON THE OPPOSITE AXIAL SIDES OF SAID AIR GAP, A FORWARD FLUX CONTROLLING GROOVE IN SAID ONE OF SAID ROTOR MEMBERS AND HAVING A PORTION
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |