A system for the metering and delivery of small discrete volumes of liquid is comprised of a small or minimal number of inexpensive components. One such component is a movable member, such as a miniature precision reciprocating displacement pump head, which is driven by an actuator that comprises a shape...http://www.google.sh/patents/US20100068072?utm_source=gb-gplus-sharePatent US20100068072 - Device and Method Employing Shape Memory Alloy
