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:
Nov. 20, 2001
Filed:
Jul. 22, 1999
Peter Steinrück, Hallstadt, AT;
Franz Seifert, Vienna, AT;
Wolfgang Zeppelzauer, Vienna, AT;
Alfred Pohl, Mistelbach, AT;
Hoerbiger Ventilwerke GmbH, Vienna, AT;
Abstract
A wear monitor suitable in particular for monitoring the wear and tear of rider rings (,) on the pistons (,) of horizontally operating reciprocating compressors presents a sensor (,) that monitors the thickness of the rider ring (,) at least indirectly, is arranged in the area of the rider ring (,) in such a way as to move together with it and can be interrogated without contact via a motionless interrogation unit (,), which communicates with an evaluation unit (,). The sensor (,) preferably presents a passive surface acoustic wave element (,), whose electromagnetic reflection behavior depends on the thickness of the rider ring (,) consequent upon the degree of wear and tear thereof and which communicates with a sensor antenna (,) moving together with it, while the interrogation unit (,) presents a communicating interrogation antenna (,).