Sensor for measuring the speed and/or position of a piston in relation to that of the cylinder it moves inside of in a dashpot or shock absorber

US5233293A · kind A · utility

Assignee

• August Bilstein GmbH & Co. KG · DE

Inventors

• Zhen Huang · Longbeilingcun, CN
• Ludger Gesenhues · Witten, DE
• Hans Hoffmann
• Klaus Schmidt · Eibelstadt, DE
• Reinhard Holscher · Salzkotten, DE
• Thomas Kruner · Ennepetal, DE

Key dates

• Filing date: Nov 15, 1991
• Grant date: Aug 3, 1993
• Expiry date: Nov 15, 2011

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F2230/08
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A sensor for measuring the speed and/or position of a piston in relation to that of the cylinder it moves inside of in a dashpot of shock absorber for motor vehicles. The sensor consists of a permanent magnet (10) connected to the cylinder (1) and of a sensor winding (9) in the form of a cylindrical coil that operates in conjunction with the magnet. The sensor winding has leads at the ends. Additional leads for a shorter winding component (7 and 8) extend out separately upstream of the ends of the sensor winding.