F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F16 ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
F16K VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
31/00 Actuating devices;; Operating means; Releasing devices
F16K31/004 actuated by piezoelectric means
F16K31/007 Piezoelectric stacks