Patent · US Expired

Sensor for determining liquid level in a container

US4958518A · kind A · utility

11Cited by

5References

10Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Josef Duenstl · Lichtenfels, DE
Siegfried Willner · Lichtenfels, DE
Ralph Schroeppel · Kupferberg, DE

Key dates

Filing date	Oct 18, 1988
Grant date	Sep 25, 1990
Priority date	—
Expiry date	Oct 18, 2008

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S367/908
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A rod shaped or tubular housing for a sensor includes an interior space provided with upper and lower compensating openings and within which an ultrasound measured distance device. Below the ultrasound measured distance device, the interior is connected to the lower compensating opening through a narrow channel proceeding in an axial direction of the housing. The housing is formed of two half shells of plastic joined to one another whose wall parts engage into one another to form the narrow channel. The ultrasound transducers and the electrical leads are embedded into the half shells. A second ultrasound measured distance device which is in direct communication with the surrounding space may be provided above the interior space. The ultrasound transducer of the measured distance device is excited to transmit in a pulsed fashion.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.