US3293469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical alternator
Assignee: Caterpillar Inc
•
Filing: 1964-01-28
•
Granted: 1966-12-20
•
Expires: 1984-01-28
Abstract
No abstract record available.
Inventors
- 👤 James L Crawford
- 👤 Paul J Staebler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:06
CPC Classifications
H; H02; H02K; H02K19/00; H02K19/16; H02K19/18; H02K19/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN A ROTOR FOR AN ELECTRIC GENERATOR THE COMBINATION COMPRISING: A CYLINDRICAL ROTOR CORE; AND A PLURALITY OF POLE PIECES APPROXIMATELY ELLIPTICAL IN SHAPE SO AS TO HAVE A MAJOR AXIS, SAID POLE PIECES DISPOSED AT SPACED APART LOCATIONS ON SAID CORE WITH THEIR MAJOR AXES GENERALLY PERPENDICULAR TO THE LONGITUDINAL AXIS OF SAID CORE; SAID POLE PIECES INCLUDING AT LEAST ONE FIRST POLE PIECE; SAID POLE PIECE INCLUDING SECOND POLE PIECES WHEREIN A PAIR OF SAID SECOND POLE PIECES IS DISPOSED ON OPPOSITE SIDES OF A FIRST POLE PIECE AND ORIENTED TO HAVE THEIR MAJOR AXES GENERALLY PERPENDICULAR TO THE MAJOR AXES OF SAID FIRST POLE PIECES.
Claim 2
Dependent Claim
108 words
IN A ROTOR FOR AN ELECTRIC GENERATOR THE COMBINATION COMPRISING: A CYLINDRICAL ROTOR CORE; AND A PLURALITY OF POLE PIECES APPROXIMATELY ELLIPTICAL IN SHAPE SO AS TO HAVE A MAJOR AXIS, SAID POLE PIECES DISPOSED AT SPACED APART LOCATIONS ON SAID CORE WITH THEIR MAJOR AXES GENERALLY PERPENDICULAR TO THE LONGITUDINAL AXIS OF SAID CORE; SAID POLE PIECES INCLUDING AT LEAST ONE FIRST POLE PIECE; SAID POLE PIECE INCLUDING SECOND POLE PIECES WHEREIN A PAIR OF SAID SECOND POLE PIECES IS DISPOSED ON OPPOSITE SIDES OF A FIRST POLE PIECE AND ORIENTED TO HAVE THEIR MAJOR AXES GENERALLY PERPENDICULAR TO THE MAJOR AXES OF SAID FIRST POLE PIECES.
References Cited (Backward Citations)
US588602A
Cited
US2108662A
Cited
US2243318A
Cited
US2796542A
Cited
US3132269A
Cited
US3223866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |