US3695104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic flowmeter having removable liner
Assignee: Fischer and Porter Co
•
Filing: 1971-05-28
•
Granted: 1972-10-03
•
Expires: 1991-05-28
Abstract
Abstract An electromagnetic flowmeter having a meter pipe of magnetic material terminating at either end in a coupling flange. Coils are disposed within the pipe to establish an electromagnetic field which is mutually perpendicular to the longitudinal axis of the pipe and to a diametrical axis extending between a pair of electrodes mounted on the pipe. Telescopically insertable within the pipe is a replaceable liner assembly including a relatively rigid sleeve of non-magnetic material having a flange at only one end thereof which, when the sleeve is inserted, abuts the face of the corresponding flange in the meter pipe. Concentrically disposed within the sleeve is a tubular liner of resilient insulating material. The liner is provided at one end with a first flange abutting the face of the sleeve flange, and a second flange at the other end thereof, which when the assembly is in place, is adapted to abut the face of the corresponding pipe flange. The liner is bonded to the inner wall of said sleeve except at the end portion thereof which includes said second flange, whereby by temporarily collapsing the unbonded portion of the liner, the assembly may be readily telescoped within the pipe.
Inventors
- 👤 Elmer D Mannherz
- 👤 Henry M Hermanns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:53
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/56; G01F1/58; G01F1/588
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
126 words
In combination with an electromagnetic flowmeter having a pipe provided at either end witH a coupling flange, a replaceable liner assembly comprising: A. a sleeve of relatively rigid non-magnetic material, having a flange at only one end thereof which when the assembly is inserted, lies against the corresponding flange on the pipe, and B. a tubular liner of resilient insulating material concentrically disposed within said sleeve, said liner having a first flange which abuts the flange of the sleeve and a second flange adapted to abut the corresponding flange on the pipe, said liner being bonded to said sleeve except at the end portion thereof which includes said second flange, whereby the end portion may be collapsed to permit insertion of the assembly in said pipe.
Claim 2
Dependent Claim
126 words
In combination with an electromagnetic flowmeter having a pipe provided at either end witH a coupling flange, a replaceable liner assembly comprising: A. a sleeve of relatively rigid non-magnetic material, having a flange at only one end thereof which when the assembly is inserted, lies against the corresponding flange on the pipe, and B. a tubular liner of resilient insulating material concentrically disposed within said sleeve, said liner having a first flange which abuts the flange of the sleeve and a second flange adapted to abut the corresponding flange on the pipe, said liner being bonded to said sleeve except at the end portion thereof which includes said second flange, whereby the end portion may be collapsed to permit insertion of the assembly in said pipe.
Claim 3
Dependent Claim
16 words
A liner assembly as set forth in claim 1, wherein said liner is formed of polyurethane.
Claim 4
Dependent Claim
17 words
A liner assembly as set forth in claim 1 wherein said sleeve is formed of stainless steel.
Claim 5
Dependent Claim
16 words
A liner assembly as set forth in claim 1, wherein said sleeve is formed of aluminum.
Claim 6
Dependent Claim
25 words
A flowmeter combination as set forth in claim 1, further including as assembling ring insertable in said sleeve to effect collapse of said end portion.
Claim 7
Dependent Claim
177 words
An electromagnetic flowmeter comprising: A. a pipe of magnetic material having coupling flanges on either end thereof to define between said flanges an annular channel; B. coils disposed in said annular channel to establish an electromagnetic field at right angles to the longitudinal axis of the pipe; C. a pair of electrodes disposed at diametrically opposed positions on said pipe; and D. a replaceable liner assembly telescopable within said pipe, said assembly being constituted by a sleeve of non-magnetic material having a flange only at one end thereof, which when the sleeve is inserted, lies against the corresponding pipe flange, and a tubular liner of resilient insulating material concentrically disposed within said sleeve, said liner having a first flange at one end which lies against the sleeve flange, and a second flange at the other end adapted to lie against the corresponding pipe flange, said liner being bonded to said sleeve except at the end portion which includes the second flange whereby the end portion may be collapsed to permit entry of the assembly in said pipe.
Claim 8
Dependent Claim
177 words
An electromagnetic flowmeter comprising: A. a pipe of magnetic material having coupling flanges on either end thereof to define between said flanges an annular channel; B. coils disposed in said annular channel to establish an electromagnetic field at right angles to the longitudinal axis of the pipe; C. a pair of electrodes disposed at diametrically opposed positions on said pipe; and D. a replaceable liner assembly telescopable within said pipe, said assembly being constituted by a sleeve of non-magnetic material having a flange only at one end thereof, which when the sleeve is inserted, lies against the corresponding pipe flange, and a tubular liner of resilient insulating material concentrically disposed within said sleeve, said liner having a first flange at one end which lies against the sleeve flange, and a second flange at the other end adapted to lie against the corresponding pipe flange, said liner being bonded to said sleeve except at the end portion which includes the second flange whereby the end portion may be collapsed to permit entry of the assembly in said pipe.
Claim 9
Dependent Claim
16 words
A flowmeter as set forth in claim 6, wherein said sleeve is formed of stainless steel.
Claim 10
Dependent Claim
15 words
A flowmeter as set forth in claim 6, wherein said liner is formed of polyurethane.
Claim 11
Dependent Claim
31 words
A flowmeter as set forth in claim 6, wherein said electrodes are provided with heads embedded in or recessed in said liner whereby only the faces thereof are exposed to fluid.
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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |