Patent US4583401A successfully refreshed from Google Patents.
US4583401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for measuring the level of liquids or agitated charges in vessels
Assignee: BASF SE
•
Filing: 1983-11-22
•
Granted: 1986-04-22
•
Expires: 2003-11-22
Abstract
Abstract At the point or points in a vessel (1) at which the liquid or agitated charge level is to be monitored, a heat stream is fed into or out of the interior of the vessel (1) via a heat-conducting element (2) which is in thermal contact with the interior of the vessel (1) on the one hand and with a heat source or cold source (4) on the other hand. In order to indicate the level, the change in the heat stream when the liquid or agitated charge comes into contact with the elements (2) is determined by measuring the temperature of the element in the region of contact by means of a temperature sensor (5).
Inventors
- 👤 Heinz Schlindwein
- 👤 Wolfgang Ruhenbeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:58
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
Apparatus for measuring the level of a liquid or an agitated charge in a vessel, comprising a plurality of spaced elements arranged vertically in a probe tube immersed in the vessel each said element consisting of heat-conducting material, each element being located at a different level over the height of the probe tube at which the liquid or charge lever is to be monitored, and each element having two ends and being in thermal contact with the interior of the probe tube on one end and with a fluid conduit on the other end, each said element being equipped, at the said one end with a temperature sensor connected to a display, and said fluid conduit connected to a source of heat or cold fluid said source located exterior of said vessel and also being provided with a fluid temperature sensor and fluid temperature display.
Claim 2
Dependent Claim
145 words
Apparatus for measuring the level of a liquid or an agitated charge in a vessel, comprising a plurality of spaced elements arranged vertically in a probe tube immersed in the vessel each said element consisting of heat-conducting material, each element being located at a different level over the height of the probe tube at which the liquid or charge lever is to be monitored, and each element having two ends and being in thermal contact with the interior of the probe tube on one end and with a fluid conduit on the other end, each said element being equipped, at the said one end with a temperature sensor connected to a display, and said fluid conduit connected to a source of heat or cold fluid said source located exterior of said vessel and also being provided with a fluid temperature sensor and fluid temperature display.
References Cited (Backward Citations)
US2279043A
Cited
US2931224A
Cited
US3279252A
Cited
US3955416A
Cited
US4319233A
Cited
US4307606A
Cited
US4461175A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |