Patent EP0283959A1 successfully refreshed from Google Patents.
US4626786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid conductivity probe
Assignee: Henkel AG and Co KGaA
•
Filing: 1983-11-29
•
Granted: 1986-12-02
•
Expires: 2003-11-29
Abstract
Abstract This invention relates to an electrical measuring probe for determining the electrical conductivity of a liquid comprising a measuring zone extending longitudinally through the probe, through which the liquid to be measured flows and to which an electrical current is applied between electrodes, the electrodes having electrical leads remote from the liquid to be measured and those parts of the electrodes remote from the liquid to be measured forming a mechanically stabilizing and electrically conductive insertion or conductor frame of an electrically insulating sleeve which determines the shape of the probe. The insertion frame contains individual conductors in the sleeve distributed axially symmetrically in relation to the longitudinal axis of the probe, and the sleeve is made by injection-molding and consists of a chemically stable thermoplastic.
Inventors
- 👤 Kay Bodecker
- 👤 Walter Goth
- 👤 Robert Scheurl
- 👤 Hans-Erwin Strasser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:09
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/06; G01N27/07
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
190 words
An electrical measuring probe for determining the electrical conductivity of a liquid comprising a measuring zone extended longitudinally through the probe, through which the liquid to be measured flows, sets of electrodes in contact with said liquid and spaced along said measuring zone to which an electrical current is applied between each set of electrodes, the electrodes having electrode leads remote from the liquid to be measured, said electrode leads being electrically in contact with four individual conductors symmetrically distributed at equal intervals around the longitudinal axis of the probe, said electrode leads electrically in contact with said four individual conductors, said four individual conductors forming a mechanically stabilizing and electrically conductive conductor frame covered with an electrically insulating sleeve, and wherein the sleeve consists of a chemically stable thermoplastic in intimate contact with said conductor frame, said measuring zone leading to a liquid outlet, said conductor frame being connected to an insulating receiving element in turn connected to an adjoining cable guide, wherein said insulating receiving element connected to the conductor frame, said adjoining cable guide, and said electrodes, are arranged symmetrically in relation to the axis of symmetry.
Claim 2
Dependent Claim
190 words
An electrical measuring probe for determining the electrical conductivity of a liquid comprising a measuring zone extended longitudinally through the probe, through which the liquid to be measured flows, sets of electrodes in contact with said liquid and spaced along said measuring zone to which an electrical current is applied between each set of electrodes, the electrodes having electrode leads remote from the liquid to be measured, said electrode leads being electrically in contact with four individual conductors symmetrically distributed at equal intervals around the longitudinal axis of the probe, said electrode leads electrically in contact with said four individual conductors, said four individual conductors forming a mechanically stabilizing and electrically conductive conductor frame covered with an electrically insulating sleeve, and wherein the sleeve consists of a chemically stable thermoplastic in intimate contact with said conductor frame, said measuring zone leading to a liquid outlet, said conductor frame being connected to an insulating receiving element in turn connected to an adjoining cable guide, wherein said insulating receiving element connected to the conductor frame, said adjoining cable guide, and said electrodes, are arranged symmetrically in relation to the axis of symmetry.
Claim 3
Dependent Claim
14 words
The measuring probe of claim 1, wherein the electrodes are comprised of noble metal.
Claim 4
Dependent Claim
16 words
The measuring probe of claim 1, wherein the individual conductors of the frame have been sand-blasted.
Claim 5
Dependent Claim
20 words
The measuring probe of claim 1, wherein the individual conductors of the frame are provided with notches at regular intervals.
Claim 6
Dependent Claim
13 words
The measuring probe of claim 1, wherein the thermoplastic is an ethylene/tetrafluoroethylene copolymer.
References Cited (Backward Citations)
US1670640A
Cited
US3940732A
Cited
US3774105A
Cited
US4091324A
Cited
US4196384A
Cited
US4227151A
Cited
DE3006877A1
Cited
US4362994A
Cited
US4500402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-01 | 1990-06-02 | 1990-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-01 | 1994-06-02 | 1994-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-01 | 1998-06-02 | 1998-12-02 | $7700.00 | Window Closed / Lapsed |