Patent · US Active

Weighing system using electromagnetic force compensation

US7780579B2 · kind B2 · utility

3Cited by

0References

16Claims

0Family size

Assignee

Sartorius AG · DE

Inventors

Michael Mueller · Nagold, DE
Ulrich Bajohr · Oettingen, DE
Michael Domhardt · Schmiedefeld, DE

Key dates

Filing date	Mar 13, 2006
Grant date	Aug 24, 2010
Priority date	—
Expiry date	Dec 24, 2028

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S482/903
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A weighing system, using the principle of electromagnetic force compensation, which includes a permanent magnet system (14) having an air gap, a shielding cover (12), a coil (13) located inside the air gap, a transmission lever (7) to whose longer lever arm the coil is attached, and upon whose shorter lever arm the weight transferred by the load receiver acts, a position sensor (20, 21, 22) which detects the position of the transmission lever and which is situated in the vicinity of the coil, and a control amplifier (16) for controlling the current passing through the coil. Further, at least one vertical support (25) is connected to the transmission lever in the vicinity of the coil and the position sensor and projects through an opening (27) in the shielding cover. A counterweight (26) is placed on this/these support(s) closely above the shielding cover.

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