Position measuring apparatus

US8049492B2 · kind B2 · utility

Assignee

• WABCO GmbH · DE

Inventors

• Timo Gerlach · Hannover, DE
• Mike Heurich · Rodenberg, DE
• Tino Wiggers · Seelze, DE

Key dates

• Filing date: Apr 2, 2009
• Grant date: Nov 1, 2011
• Expiry date: Sep 24, 2029

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H59/70
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A position measuring apparatus includes (a) a sleeve that has an open first end and a second end opposite the first end, (b) a guide pin guided at least partly in the sleeve, (c) a spring, (d) a linear magnetic field sensor and (e) a magnet disposed adjacent to the linear magnetic field sensor. To avoid wear even in the presence of large temperature fluctuations, the magnet is disposed on a face of the guide pin facing the second end of the sleeve, and the spring is disposed between the second end of the sleeve and the magnet such that the spring urges the magnet against the guide pin.