Patent US4806020A successfully refreshed from Google Patents.
US4806020A
Expired / Lapsed
US
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Magnetic rotator
Assignee: SENDAI MECHANIC KOGYO A CORP OF JAPAN KK
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Filing: 1987-09-18
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Granted: 1989-02-21
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Expires: 2007-09-18
Abstract
Abstract A magnetic rotator designed to extend through a hole formed in a nonmagnetic container includes magnets of opposite polarities attached to the ends of rotating shafts received in two cylinders mounted face-to-face through a flange. Interposed between the rotating shafts and the cylinders are conical roll bearings of ceramics.
Inventors
- 👤 Kazue Matsuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:12
CPC Classifications
B; B01; B01F; B01F33/00; B01F33/45; B01F33/453
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
38 words
A magnetic rotator designed to extend through a hole formed in a nonmagnetic container, in which magnets of opposite polarities are attached to the adjacent ends of rotating shafts received in two cylinders mounted face-to-face through a flange.
Claim 2
Dependent Claim
38 words
A magnetic rotator designed to extend through a hole formed in a nonmagnetic container, in which magnets of opposite polarities are attached to the adjacent ends of rotating shafts received in two cylinders mounted face-to-face through a flange.
Claim 3
Dependent Claim
33 words
A magnetic rotator as defined in claim 1, wherein said flange between said two cylinders is airtightly fixed in a hole formed in said nonmagnetic container, thereby mounting said flange on said container.
Claim 4
Dependent Claim
53 words
A magnetic rotator designed to extend through a hole formed in a non-magnetic container, in which magnets of opposite polarities are attached to the adjacent ends of rotating shafts received in two cylinders mounted face-to-face through a flange wherein conical roller bearings of ceramics are interposed between said rotating shafts and said cylinders.
Claim 5
Dependent Claim
53 words
A magnetic rotator designed to extend through a hole formed in a non-magnetic container, in which magnets of opposite polarities are attached to the adjacent ends of rotating shafts received in two cylinders mounted face-to-face through a flange wherein conical roller bearings of ceramics are interposed between said rotating shafts and said cylinders.
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) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |