Patent US4912838A successfully refreshed from Google Patents.
US4912838A
Expired / Lapsed
US
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Method of manufacturing electrode for electromagnetic flowmeter
Assignee: Azbil Corp
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Filing: 1988-12-21
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Granted: 1990-04-03
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Expires: 2008-12-21
Abstract
Abstract A method of manufacturing an electromagnetic flowmeter includes the steps of inserting and filling electrode members into a pair of insertion holes formed to oppose each other from outside to inside through the circumferential wall of a measuring pipe made of a sintered ceramic material, and heating and solidifying the electrode members to form electrodes.
Inventors
- 👤 Tsutomu Goto
- 👤 Toshihide Inami
- 👤 Masayuki Nemoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:52
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/56; G01F1/58; G01F1/584; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49117; Y10T29/49169
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
89 words
A method of manufacturing an electromagnetic flowmeter comprising the steps of: filling a pair of diametrically opposite insertion holes with a paste, said insertion holes traversing radially a circumferential wall of a measuring pipe made of a ceramic material, said measuring pipe being sintered and dimensionally stable prior to filling with said paste; heating and solidifying said paste to form electrode members, said electrode members being arranged from the outer surface of said measuring pipe to the inner surface thereof, said electrode members being integrated with said measuring pipe.
Claim 2
Independent Claim
89 words
A method of manufacturing an electromagnetic flowmeter comprising the steps of: filling a pair of diametrically opposite insertion holes with a paste, said insertion holes traversing radially a circumferential wall of a measuring pipe made of a ceramic material, said measuring pipe being sintered and dimensionally stable prior to filling with said paste; heating and solidifying said paste to form electrode members, said electrode members being arranged from the outer surface of said measuring pipe to the inner surface thereof, said electrode members being integrated with said measuring pipe.
Claim 3
Dependent Claim
13 words
A method according to claim 1, wherein said paste comprises a metallic paste.
Claim 4
Dependent Claim
18 words
A method according to claim 1, wherein each of said electrode members has a conical inner end portion.
Claim 5
Dependent Claim
18 words
A method according to claim 1, wherein each of said electrode members has a disk-like inner end portion.
Claim 6
Dependent Claim
37 words
A method according to claim 1, wherein each of said electrode members comprises a rod member and a metal layer formed between the inner surface of a corresponding one of said insertion holes and said rod member.
Claim 7
Dependent Claim
39 words
A method according to claim 5, wherein said metal layer is formed by inserting the rod member in said corresponding one of said insertion holes after a metal paste is coated on the circumferential surface of said rod member.
Claim 8
Dependent Claim
25 words
A method according to claim 5, wherein a metal cap connected to said metal layer is mounted on the outer end of said rod member.
Claim 9
Dependent Claim
19 words
A method according to claim 5, wherein an outer end portion of said rod member has a large diameter.
Claim 10
Dependent Claim
40 words
A method according to claim 8, wherein a seat is formed in an outer opening end portion of each of said insertion holes, and the large-diameter portion of said rod member is fitted in said seat through said metal layer.
Claim 11
Dependent Claim
19 words
A method according to claim 5, wherein an inner end portion of said rod member has a large diameter.
Claim 12
Dependent Claim
40 words
A method according to claim 10, wherein a seat is formed in an inner opening end portion of each of said insertion holes, and the large-diameter portion of said rod member is fitted in said seat through said metal layer.
Claim 13
Dependent Claim
44 words
A method according to claim 5, wherein said metal layer is formed by inserting the rod member in said corresponding one of said insertion holes after a metal paste is coated on the circumferential surface and the inner end face of said rod member.
Claim 14
Dependent Claim
22 words
A method according to claim 5, wherein said rod member comprises a cylindrical member having a bottom and an open outer end.
Claim 15
Dependent Claim
46 words
A method according to claim 5, wherein an outer end portion of said corresponding one of said insertion holes is tapered and filled with a metal member after said rod member coated with said metal layer is inserted in said corresponding one of said insertion holes.
Claim 16
Dependent Claim
32 words
A method according to claim 5, wherein a large-diameter portion for positioning with respect to said corresponding one of said insertion holes is formed at the outer end of said rod member.
Claim 17
Dependent Claim
26 words
A method according to claim 5, wherein said corresponding one of said insertion holes is tapered, and the distal end of said rod member is conical.
Claim 18
Dependent Claim
14 words
A method according to claim 5, wherein said rod member comprises a ceramic material.
Claim 19
Dependent Claim
14 words
A method according to claim 5, wherein said rod member comprises a metal member.
Claim 20
Dependent Claim
90 words
A method according to claim 1, wherein each of said electrode members comprises a rod member and a metal layer formed between the inner surface of a corresponding one of said insertion holes and said rod member, said corresponding one of said insertion holes is formed to be sufficiently larger than the outer diameter of said electrode member and after said electrode member is inserted in said corresponding one of said insertion holes, a brazing member having a melting point lower than that of said metal layer is filled therein.
Claim 21
Dependent Claim
32 words
A method according to claim 19, wherein after a second metal layer is formed on the inner surface of said corresponding one of said insertion holes, said electrode member is inserted therein.
Claim 22
Dependent Claim
39 words
A method according to claim 19, wherein after a metal paste in coated on the circumferential surface of said rod member, said metal layer is formed by inserting the rod member in said corresponding one of said insertion holes.
Claim 23
Dependent Claim
39 words
A method according to claim 19, wherein a metal cap connected to said metal layer is mounted on the outer end of said rod member after said metal layer is inserted in said corresponding one of said insertion holes.
Claim 24
Dependent Claim
44 words
A method according to claim 19, wherein after a metal paste is coated on the circumferential surface and the inner end face of said rod member, said metal layer is formed by inserting the rod member in said corresponding one of said insertion holes.
Claim 25
Dependent Claim
25 words
A method according to claim 23, wherein a metal cap is mounted on the inner end face of said rod member through said metal paste.
Claim 26
Dependent Claim
26 words
A method according to claim 19, wherein said corresponding one of said insertion holes is tapered, and the distal end of said rod member is conical.
Claim 27
Dependent Claim
60 words
A method according to claim 1, wherein each of said electrode members comprises a rod member, each of said insertion holes is formed to be sufficiently larger than the size of said electrode member and after said rod member is inserted in at least one of said insertion holes, a brazing member having a low melting point is filled therein.
Claim 28
Dependent Claim
41 words
A method according to claim 26, wherein a seat is formed in an outer opening end portion of said at least one insertion hole, and a large-diameter portion of said rod member is fitted in said seat through said metal layer.
Claim 29
Dependent Claim
41 words
A method according to claim 26, wherein a seat is formed in an inner opening end portion of said at least one insertion hole, and a large-diameter portion of said rod member is fitted in said seat through said metal layer.
Claim 30
Dependent Claim
25 words
A method according to claim 26, wherein said at least one insertion hole is tapered, and the distal end of said rod member is conical.
Claim 31
Dependent Claim
68 words
A method according to claim 1, wherein each of said electrode members comprises a metal member and a brazing member having a lower melting point than that of said metal member, and after a layer of said metal member is formed on the inner surface of each of said insertion holes, said brazing member having the lower melting point than that of said metal layer is filled therein.
Claim 32
Dependent Claim
15 words
A method according to claim 30, wherein said metal layer consists of a metal paste.
Claim 33
Dependent Claim
25 words
A method according to claim 30, wherein said metal layer has a flange at an inner periphery of at least one of said insertion holes.
Claim 34
Dependent Claim
22 words
A method according to claim 30, wherein at least one of said insertion holes is tapered at an inner end portion thereof.
Claim 35
Dependent Claim
24 words
A method according to claim 30, wherein a seat is formed in an inner opening end portion of said at least one insertion hole.
Claim 36
Dependent Claim
23 words
A method according to claim 30, wherein a seat is formed in an outer end portion of said at least one insertion hole.
Claim 37
Dependent Claim
19 words
A method according to claim 30, wherein said at least one insertion hole is tapered from outside to inside.
Claim 38
Independent Claim
101 words
A method of manufacturing an electromagnetic flowmeter, comprising the steps of: filling a pair of diametrically opposite insertion holes with a paste, said insertion holes traversing radially a circumferential wall of a measuring pipe made of a ceramic material, said measuring pipe being sintered and dimensionally stable prior to filling with said paste; heating and solidifying said paste to form electrode members, said electrode members being arranged from the outer surface of said measuring pipe to the inner surface thereof, said electrode members being integrated with said measuring pipe; wherein each of said electrode members includes at least a metallized layer.
Claim 39
Independent Claim
101 words
A method of manufacturing an electromagnetic flowmeter, comprising the steps of: filling a pair of diametrically opposite insertion holes with a paste, said insertion holes traversing radially a circumferential wall of a measuring pipe made of a ceramic material, said measuring pipe being sintered and dimensionally stable prior to filling with said paste; heating and solidifying said paste to form electrode members, said electrode members being arranged from the outer surface of said measuring pipe to the inner surface thereof, said electrode members being integrated with said measuring pipe; wherein each of said electrode members includes at least a metallized layer.
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) | 1993-04-02 | 1993-10-02 | 1994-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-02 | 1997-10-02 | 1998-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-02 | 2001-10-02 | 2002-04-03 | $7700.00 | Window Closed / Lapsed |