Applicator head for dosed dispensation of fluid mediums

Details Applicator head for dosed dispensation of fluid mediums Applicator head for dosed dispensation of fluid mediums

1995-04-03

1998-02-24

Kaufman, Joseph

Dispensing

With heating or cooling means

Heating only

222504, 222509, B67D 562

Patent

active

057204179

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.

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