Selective mode handwheel valve operator
Selectively engageable linear power actuator
Stand-by drive operable by a crank handle
Valve actuating device
Valve actuator
Valve actuator and spring biasing cartridge
Valve actuator declutch mechanism
Valve actuator differential worm planetary gear drive
Valve actuator with continuous manual override
Valve actuators
Valve operator
Valve operator de-clutch mechanism
Winch for various shutters used for evacuation of smoke and vent
Window lift drive
Window lifter drive for motor vehicles and the like
Window lifter of a motor vehicle