Weighing system having an angle lever with a long vertical lever arm

US7411138B2 · kind B2 · utility

Assignee

• Sartorius AG · DE

Inventors

• Fabian Walter · Northeim, DE
• Otto Kuhlmann · Oettingen, DE
• Peter Fleischer · Nuremberg, DE
• Wilfried Langner · Friedberg, DE

Key dates

• Filing date: Jan 29, 2007
• Grant date: Aug 12, 2008
• Expiry date: Jan 29, 2027

Classification

• Technology area (CPC G): Physics
• CPC primary: G01G21/244
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A weighing system that operates according to the principle of electromagnetic force compensation, having two connecting rods (2, 3) which are fashioned as a parallel guide and connect a load receiver (4) to a base area (1) fixed to the housing, and having an angle lever (5) mounted on the base area. The force due to weight that is transmitted by the load receiver acts upon the short lever arm (5′) of the angle lever via a coupling element, and a coil projecting into the air gap of a permanent magnet system (7) is fastened to the long lever arm (5″). The weighing system occupies only a small area since the long lever arm takes the form of a vertical lever arm and extends, at least in part, in the area underneath the connecting rods of the parallel guide. The permanent magnet system is likewise arranged underneath the connecting rods of the parallel guide.