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:
Dec. 16, 2003
Filed:
Nov. 13, 2000
Kurt Stoll, Esslingen, DE;
Peter Post, Nellingen-Ostfildern, DE;
Michael Weinmann, Plüderhausen, DE;
Herbert Vollmer, Notzingen, DE;
Andreas Muth, Kirchheim/Teck, DE;
Festo AG & Co., Esslingen, DE;
Abstract
A microvalve, which contains a valve member ( ) dividing a valve chamber ( ) into two chamber parts ( and ). A first chamber part ( ) is delimited by a duct layer ( ), which has an input flow opening ( ) and at least one output flow opening ( and ). Fluid transfer between the input flow opening ( ) and the output flow opening ( and ) may be controlled by the valve member ( ). Furthermore pressure relieving means are provided which are effective in the open position of the valve member ( ), such means comprising at least one expansion recess ( ) provided on the valve member and with at least partial overlap opposite to the output flow opening ( and ), same permitting an expansion of the transferring fluid. It is connected through valve member ( ) with the second chamber part ( ) so that a counter pressure may build up here causing the relief of pressure.