Patent · US Active

Weighing apparatus with proximity sensor

US10393569B2 · kind B2 · utility

1Cited by

3References

13Claims

0Family size

Assignee

SARTORIUS LAB INSTRUMENTS GMBH & CO. KG · DE

Inventors

Heinrich Feldotte · Oettingen, DE
Manuel Juenemann · Oettingen, DE
Malte Staender · Heiligenstadt, DE

Key dates

Filing date	Nov 22, 2017
Grant date	Aug 27, 2019
Priority date	—
Expiry date	Nov 22, 2037

Classification

Technology area (CPC H)Electricity
CPC primaryH03K2217/94108
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A weighing apparatus includes —a sample holder (20), —a protective housing (14, 16, 18) with an access port (181) and a closure element (26), —a reflection sensor (34) with a radiation emitter (37) emitting sensor radiation (38) reflected by a reflecting object (39) and with a radiation receiver (42) receiving a sensor radiation component (40), reflected by the object and —a control unit (32), connected to a motorized drive (30) of the closure element and to the reflection sensor, and which controls the motorized drive with a reflection sensor signal, for transferring the closure element between closed and open positions. A differentiating element subjects a sensor primary signal (52) of the reflection sensor to a differentiation. The primary signal depends on a reflection intensity of the reflected radiation component and generates a sensor secondary signal (60). The control unit controls the motorized drive based on the sign of the secondary signal.

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