Jan 16, 1992 - Primary ExaminerâMax H. Noori. Assistant ExaminerâHarshad Patel. Attorney, Agent, or FirmâThomas S.
USO0RE36376E
United States Patent [19]
[11] E
Cage et al.
[45] Reissued Date of Patent:
[54]
STABILITY CORIOLIS MASS FLOW METER
[75]
Inventors: Donald R. Cage, Longmont; James R.
US' PATENT DOCUMENTS 4,491,025
1/1985 Smith et al. .
4,768,385
9/1988 Cage .
4,823,613
4/1989 Cage et al. ......................... .. 73/861.38
Assignee; Micro Motion, Inc” Boulder, Cob
[87]
References Cited
both of Boulder, all of Colo.
Appl NO .
[22] [86]
Nov. 9, 1999
4,422,338 12/1983 Smith .
[21]
09A10 015
..
.
[56]
Re. 36,376
Ruesch; Timothy J. Cunningham, [73]
.
Patent Number:
FOREIGN PATENT DOCUMENTS
,
_
PCT Flled' PCT NO;
Jun‘ 8’ 1990 PCT/US90/03284
§ 371 Date:
Jan. 16, 1992
O 212 782
3/1987
European Pat. Off. .
0 250 706 1337668A1
1/1988 9/1987
U.S.S.R. .
8706691
11/1987
European Pat. Off. . WIPO .
OTHER PUBLICATIONS
§ 102(6) Date? Jan- 16, 1992
PP. Kremlevsky, Flowmeters and Quantity Meters, 1989,
PCT Pub. NO.Z W090/15310
PP~ 348_351~ Primary Examiner—Max H. Noori
PCT Pub. Date: Dec. 12, 1990 Related US. Patent Documents
Reissue of:
[64] iitlfélézNo"
Assistant Examiner—Harshad Patel Attorney, Agent, or Firm—Thomas S. Hahn
[57]
ABSTRACT
232115257199 4
An optimized Coriolis mass ?oW meter is disclosed Which
AppL NO‘,
07/820,848
has improved stability to excitations caused by external
Filed:
Jun_ 8’ 1990
in?uences. Aprimary source of improvement‘ involves deter
U'S Applications,
mining by modal analysis of the How conduit a location for
[
the sensor means that minimizes the in?uence of external excitation of one or more of the ?rst in phase bending mode,
[63] Continuation-in-part of application No. 07/364,032, Jun. 9,
the_ ?rst out of phase bending mode> the ?rst out of phase
[51]
1989, abandoned, Int. c1.6 ...................................................... .. G01F 1/84
tWist mode, the second out of phase tWist mode, the second out of phase bending mode and the third out of phase
[52]
US. Cl. ....................................................... .. 73/861355
[58]
Field of Search ...................... .. 73/861355, 861.356
bending mode.
10 Claims, 29 Drawing Sheets
U.S. Patent
Nov. 9, 1999
Sheet 1 0f 29
FIG. IA
¢=22.5° R= | 25
Re. 36,376
U.S. Patent
Nov. 9, 1999
Sheet 2 0f 29
Re. 36,376
U.S. Patent
Nov. 9, 1999
F164
Sheet 3 0f 29
Re. 36,376
U.S. Patent
Nov. 9, 1999
Sheet 5 0f 29
Re. 36,376
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