US3658264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roller mill drive
Assignee: Gebr Pfeiffer Barbarossawerke AG
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Filing: 1970-11-16
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Granted: 1972-04-25
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Expires: 1990-11-16
Abstract
Abstract Drive for roller mills having a horizontally disposed grinding vessel rotatable about a vertical axis and rollers rolling in the vessel that rotate about stationary axles which are under pressure, where one part of the support of the outer periphery of the grinding vessel constitutes the rotor of the electromotor which drives the vessel and which carries the rotor winding is encompassed by a horizontally disposed stationary stator supported directly in the housing of the mill.
Inventors
- 👤 Siegfried Schauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:29
CPC Classifications
B; B02; B02C; B02C15/00; B02C15/006; B02C15/007
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
102 words
Roller mill drive for roller mill of the type having a grinding vessel disposed in horizontal position in a housing for rotation about a vertical axis and grinding rollers disposed above said vessel operative in response to rotation of said vessel to roll and grind material, said rollers being supported on stationary axles under downward pressure, a support extending downwardly from said vessel, a pedestal disposed below said support, said vessel and support defining the rotor of a motor, a rotor winding extending peripherally about said rotor, and a stator winding fixedly supported in said housing and extending around said rotor winding.
Claim 2
Dependent Claim
102 words
Roller mill drive for roller mill of the type having a grinding vessel disposed in horizontal position in a housing for rotation about a vertical axis and grinding rollers disposed above said vessel operative in response to rotation of said vessel to roll and grind material, said rollers being supported on stationary axles under downward pressure, a support extending downwardly from said vessel, a pedestal disposed below said support, said vessel and support defining the rotor of a motor, a rotor winding extending peripherally about said rotor, and a stator winding fixedly supported in said housing and extending around said rotor winding.
Claim 3
Dependent Claim
43 words
Rotor mill drive in accordance with claim 1, including a base below said rotor having a stud extending downwardly therefrom into said base, an axial bearing between said base and said pedestal, and a radial bearing disposed intermediate said stud and said pedestal.
References Cited (Backward Citations)
CA561582A
Cited
US2635198A
Cited
US2722612A
Cited
US2909330A
Cited
GB771185A
Cited
US3083920A
Cited
US3549922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |