Patent US2294792A successfully refreshed from Google Patents.
US4635486A
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Electromagnetic flow meter
Assignee: Danfoss AS
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Filing: 1985-05-24
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Granted: 1987-01-13
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Expires: 2005-05-24
Abstract
Abstract The invention relates to an electromagnetic flow meter with a magnetic system having two magnetic poles which are attachable to a measuring tube from the outside, an outer yoke, and at least one separating gap. Each pole has a pole shoe and a core section carrying a winding which is connected at the radially outward end thereof without a gap to the adjoining magnetic system portion and the separating gap is disposed beyond the magnetic path for the stray flux.
Inventors
- 👤 Hans E. Jacobsen
- 👤 Henning M. Hansen
- 👤 John Nyrup
- 👤 Henry Hansen
- 👤 Konstantin Lassithiotakis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:21
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/56; G01F1/58; G01F1/586
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
121 words
An electromagnetic flow meter, comprising a measuring tube of an electrically insulating material having a cylindrically shaped section, a magnetic system having two magnetic poles with pole shoes thereto attachable externally to diametrically opposite sides of said measuring tube, said poles including core sections carrying windings connected to said shoes, outer yoke means surrounding said poles, said poles including radially outward plate means connected to said core sections which extend circumferentially beyond said windings to receive stay flux from said pole shoes, and said yoke means having separating gap means associated therewith disposed beyond the magnetic path of said stray flux emanating from either of said pole shoes, said gap means being disposed between said plate means and said poles means.
Claim 2
Dependent Claim
121 words
An electromagnetic flow meter, comprising a measuring tube of an electrically insulating material having a cylindrically shaped section, a magnetic system having two magnetic poles with pole shoes thereto attachable externally to diametrically opposite sides of said measuring tube, said poles including core sections carrying windings connected to said shoes, outer yoke means surrounding said poles, said poles including radially outward plate means connected to said core sections which extend circumferentially beyond said windings to receive stay flux from said pole shoes, and said yoke means having separating gap means associated therewith disposed beyond the magnetic path of said stray flux emanating from either of said pole shoes, said gap means being disposed between said plate means and said poles means.
Claim 3
Dependent Claim
29 words
A flow meter according to claim 1 characterized in that said separating gap means extend over a larger area than does the cross-section of either of said core sections.
Claim 4
Dependent Claim
34 words
A flow meter according to claim 1 characterized in that said core sections are connected without a gap to said yoke means and said yoke means is segmented to form said separating gap means.
Claim 5
Dependent Claim
22 words
A flow meter according to claim 1 characterized in that said core sections are made in one piece with said plate means.
Claim 6
Dependent Claim
22 words
A flow meter according to claim 1 characterized in that said core sections are made in one piece with said yoke means.
Claim 7
Dependent Claim
23 words
A flow meter according to claim 1 characterized in that said yoke means comprise laminae perpendicular to the axis of said measuring tube.
Claim 8
Dependent Claim
25 words
A flow meter according to claim 1 wherein an adjoining magnetic system portion surround said core sections is magnetically conductively interconnected with said core sections.
Claim 9
Dependent Claim
15 words
A flow meter according to claim 1 characterized in that said windings are disk windings.
References Cited (Backward Citations)
US3406569A
Cited
US4181018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-12 | 1990-07-14 | 1991-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-12 | 1994-07-14 | 1995-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-12 | 1998-07-14 | 1999-01-13 | $7700.00 | Window Closed / Lapsed |