Wave-powered, reciprocating hose peristaltic pump
Wec with improved power take off apparatus
Wheel for rotary machines
Whell designed for cooperation with a fluid
Wicket gate end seals
Wicket gate for turbines
Wicket gate of hydraulic machine with the end-face sealing...
Wicket gate operating mechanism for hydraulic machines
Wicket gate overload sensor and protector
Wind and tide motor
Wind powered turbine in a tunnel