Patent US4500676A successfully refreshed from Google Patents.
US3272444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gearless rotary mill
Assignee: General Electric Co
•
Filing: 1963-08-28
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Granted: 1966-09-13
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Expires: 1983-08-28
Abstract
No abstract record available.
Inventors
- 👤 Edward A E Rich
- 👤 John J Brockman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:30
CPC Classifications
H; H02; H02P; H02P27/00; H02P27/04; H02P27/06; B; B02; B02C; B02C17/00; B02C17/18; B02C17/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A RELATIVELY LOW SPEED GEARLESS ROTARY MILL ADAPTED TO MINIMIZE MECHANICAL STRESSES WHICH ARE INDUCED WITHIN THE ROTOR OF A DRIVING MOTOR DUE TO UNEQUAL THERMAL EXPANSIONS AND CONTRACTIONS WITHIN THE ROTOR AND MILL MEMBERS, COMPRISING A ROTARY MILL COMPRISING A ROTATABLE RECEPTACLE FOR TREATING MATERIAL IN SAID RECEPTACLE WHILE SAID RECEPTACLE IS BEING ROTATED, AND AN ELECTRIC MOTOR HAVING A ROTOR AND STATOR, SAID STATOR BEING STATIONARILY MOUNTED, SAID ROTOR BEING SPACED FROM SAID RECEPTACLE AND RESILIENTLY SUPPORTED THEREFROM WHEREBY SAID RECEPTACLE IS ROTATED BY SAID MOTOR THROUGH A RESILIENT GEARLESS DRIVING ARRANGEMENT WHICH MINIMIZE MECHANICAL STRESSES THAT TEND TO BE DEVELOPED WITHIN THE MOTOR ROTOR DUE TO UNEQUAL TEMPERATURE CONDITIONS RESULTING FROM MILL AND MOTOR OPERATION.
Claim 2
Dependent Claim
118 words
A RELATIVELY LOW SPEED GEARLESS ROTARY MILL ADAPTED TO MINIMIZE MECHANICAL STRESSES WHICH ARE INDUCED WITHIN THE ROTOR OF A DRIVING MOTOR DUE TO UNEQUAL THERMAL EXPANSIONS AND CONTRACTIONS WITHIN THE ROTOR AND MILL MEMBERS, COMPRISING A ROTARY MILL COMPRISING A ROTATABLE RECEPTACLE FOR TREATING MATERIAL IN SAID RECEPTACLE WHILE SAID RECEPTACLE IS BEING ROTATED, AND AN ELECTRIC MOTOR HAVING A ROTOR AND STATOR, SAID STATOR BEING STATIONARILY MOUNTED, SAID ROTOR BEING SPACED FROM SAID RECEPTACLE AND RESILIENTLY SUPPORTED THEREFROM WHEREBY SAID RECEPTACLE IS ROTATED BY SAID MOTOR THROUGH A RESILIENT GEARLESS DRIVING ARRANGEMENT WHICH MINIMIZE MECHANICAL STRESSES THAT TEND TO BE DEVELOPED WITHIN THE MOTOR ROTOR DUE TO UNEQUAL TEMPERATURE CONDITIONS RESULTING FROM MILL AND MOTOR OPERATION.
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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 |