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:
Feb. 24, 1998
Filed:
Apr. 03, 1995
Heiko Wurth, Oberursel, DE;
Martin Reuter, Dachau, DE;
ITW Dynatec GmbH Klebetechnik, Erkrath, DE;
Abstract
The present invention comprises an applicator head for the dosed dispensation of fluid mediums wherein a valve member and a valve drive are arranged within a casing. The valve drive comprises at least one piezoelectric element connected with a voltage supply and comprising several parallel, juxtaposed piezoelectric stacks which are flexibly mounted. The present invention provides a piezoelectrically driven applicator head which is simple and economical to manufacture, and which is usable not only in the low-temperature range but also in the high-temperature range. The valve drive also includes a rocker member which is pivotably mounted at a joint region, a free end of the rocker member is fixedly connected to the valve member, and the piezoelectric element comprises two piezoelectric stacks which are operatively connected to the joint region of the rocker member upon opposite sides of an axis extending perpendicularly through the joint region and wherein the piezoelectric stacks are adapted to be alternately actuated with respect to the rocker member.