Patent · US Active

Drainage pump unit

US9333281B2 · kind B2 · utility

62Cited by

4References

17Claims

0Family size

Assignee

MEDELA HOLDING AG · CH

Inventors

Charles Giezendanner · Morschach, CH
Martin Melzer · Karlsruhe, DE

Key dates

Filing date	Jan 16, 2012
Grant date	May 10, 2016
Priority date	—
Expiry date	Apr 30, 2034

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61M2205/3389
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A drainage pump unit for aspirating body fluids by means of a suction pump has a suction pump arranged in a suction pump housing, wherein a fluid collection container can be secured releasably on the suction pump housing, and wherein a capacitive filling level sensor is arranged on the suction pump housing for detecting a filling level in the fluid collection container. The filling level sensor has at least two electrodes, which are arranged at a distance from each other and extend along a common path. A first of the electrodes is in one piece, and a second of the electrodes is segmented. This arrangement permits the production of inexpensive fluid collection containers while still ensuring a high degree of measurement accuracy.

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