Hallo,

sowas ?

http://www.firgelli.com/pdf/PQ12_datasheet.pdf

http://www.youtube.com/watch?v=fq5u7jFQFCg

http://de.nanotec.com/linearaktuator_lowcost.html

http://www.robotshop.ca/actuators.html

http://www.active-robots.com/product...actuator.shtml