Top-pan balance with an overload safety mechanism and a corner load sensor

US8383965B2 · kind B2 · utility

Assignee

• Sartorius Weighing Technology GmbH · DE

Inventors

• Detlev Erben · Oettingen, DE
• Helga Covic · Oettingen, DE
• Jochen Doerner · Oettingen, DE

Key dates

• Filing date: May 16, 2011
• Grant date: Feb 26, 2013
• Expiry date: May 16, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G01G23/005
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A top-pan balance having a pan, a weighing system, and an overload safety mechanism. The load cell (4) of the weighing system is connected to fixed points (1) on a housing of the weighing system by an upper connecting rod (2) and a lower connecting rod (3) as a parallel guide so as to be movable in the vertical direction. The pan is attached to a pan support (8/9) for securing against overload, the support being connected to the load cell through an auxiliary parallel guide (15/16) and through a biased spring element (17/18), whereby the pan is quasi rigidly coupled to the load cell in the permissible weighing range, but is only resiliently coupled to the load cell when the permissible weighing range is exceeded. At least one limit stop is fixed to the housing and limits the elastic deflection of the pan and the pan support in case of overload. An additional corner load sensor is provided between the pan support and the load cell, and the corner load sensor and the overload safety mechanism form a common assembly (7), wherein the corner load sensor is disposed behind the overload safety mechanism in the force flow direction from the pan to the load cell. Furthermore, the assembly i…