The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 29, 1996
Filed:
Apr. 28, 1995
Johannes Volzer, Heroldstatt, DE;
Festo KG, Essling, DE;
Abstract
A fluid power cylinder whose piston rod has on its outer periphery at least one axially extending surface section having the form of a flat. Such surface section has a longitudinal groove, which contains a magnetic strip able to be scanned by a sensor device on the housing. The magnetic strip has alternatingly arranged poles areas in succession, which can be scanned without contact by the sensor device. The magnetic strip is covered by a cover band fixed on the piston rod and consisting of a material allowing the passage of a magnetic field, whose external surface facing away from the magnetic strip constitutes at least a part of the piston rod's surface section having the form of a flat.