Piezo-pneumatic valve driving type dispensing pump and method of dispensing viscous liquid by using the pump
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United States of America Patent
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Feb 21, 2017
Grant Date -
May 19, 2016
app pub date -
Nov 18, 2015
filing date -
Nov 18, 2014
priority date (Note) -
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Abstract
A piezo-pneumatic valve driving type dispensing pump having an improved dispensing speed and a simplified structure, and a method of dispensing a viscous liquid by using the pump. Accordingly, a viscous liquid may be easily dispensed by reciprocating a valve rod inserted into a reservoir storing the viscous liquid, by using an air pressure. In particular, the air pressure may be precisely controlled by opening or closing a flow passage allowing the air to enter or exit, by using a piezoelectric element-based piezoelectric valve. Thus, the valve rod may be operated precisely at a high speed so that an exact amount of the viscous liquid is dispensed at a high speed.
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