Device for protecting a flexural force receiver against overloading

US4317495A · kind A · utility

Assignee

• Bizerba-Werke Wilhelm Kraut GmbH & Co. KG · DE

Inventors

• Ernst Kuhnle · Balingen, DE
• Josef Schwarz · Augsburg, DE

Key dates

• Filing date: Sep 2, 1980
• Grant date: Mar 2, 1982
• Expiry date: Sep 2, 2000

Classification

• Technology area (CPC G): Physics
• CPC primary: G01G3/1402
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In a weighing machine a flexure bar is attached as a cantilever to a beam. The force to be measured is applied to the cantilever end of the flexure bar by a weighing lever. In order to protect the flexure bar against overloading the beam is mounted to be pivotable and is held by a spring force acting counter to the direction of action of the force to be measured against a first fixed stop. The spring force is chosen such that said beam moves out of contact with the first stop when an overload is applied to the weighing lever. In addition, a second fixed stop is provided to restrict the pivotal movement of the weighing lever and thus prevent the transmission of further force into the flexure bar.