US4665736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stirring device for automatically measuring dissolved oxygen
Assignee: CENTRAL KAGAKU Co Ltd
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Filing: 1986-05-20
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Granted: 1987-05-19
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Expires: 2006-05-20
Abstract
Abstract A rotor having N and S poles is rotatively supported through bearings from the lower end of an electrode to be immersed in a water sample in which dissolved oxygen is measured. A rotor driving means is disposed adjacent to the rotor, the means generally comprising a magnet which is so constructed that the N and S poles thereof alternately approach the rotor. The rotor follows the rotation of the rotor driving means to rotate in and stir the water sample.
Inventors
- 👤 Tadashi Yokoyama
- 👤 Toshio Kaizuka
- 👤 Junichi Naito
- 👤 Kenichi Numazawa
- 👤 Minoru Ohashi
- 👤 Tomoo Kikuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:06
CPC Classifications
B; B01; B01F; B01F33/00; B01F33/45; B01F33/453
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
76 words
A stirring device for automatically measuring dissolved oxygen, characterized in that it comprises an electrode, a rotor which is rotatively attached to one end of the electrode through a support and has N and S poles and a rotating shaft perpendicular to the lengthwise direction of the electrode, and a rotor driving means which is disposed adjacent to the rotor and so constructed that the N and S poles of the means alternately approach the rotor.
Claim 2
Dependent Claim
76 words
A stirring device for automatically measuring dissolved oxygen, characterized in that it comprises an electrode, a rotor which is rotatively attached to one end of the electrode through a support and has N and S poles and a rotating shaft perpendicular to the lengthwise direction of the electrode, and a rotor driving means which is disposed adjacent to the rotor and so constructed that the N and S poles of the means alternately approach the rotor.
Claim 3
Dependent Claim
26 words
A stirring device as claimed in claim 1, wherein said rotor driving means comprises a U- or horseshoe-shaped magnet which is rotated about a vertical shaft.
Claim 4
Dependent Claim
26 words
A stirring device as claimed in claim 1, wherein said rotor driving means comprises a U- or horseshoe-shaped magnet which is rotated about a horizontal shaft.
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) | 1990-05-18 | 1990-11-17 | 1991-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-18 | 1994-11-17 | 1995-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-18 | 1998-11-17 | 1999-05-19 | $7700.00 | Window Closed / Lapsed |