Wheeled portable air compressor
Whisper quiet electromagnetic fluid pump
Wind driven air pump
Wind driven high pressure water pump
Wind energy conversion system
Wind powered apparatus
Wind-energy conversion device
Windage loss reduction arrangement for scroll fluid device
Windmill having counterbalancing mechanism
Windmill pump drive system
Windmill structures and systems
Windscreen washer unit
Windshield washer pump assembly
Windshield wiper washer motor for use in a vehicle
Worm pump for delivering a metal melt
Zero net external displacement implantable pump and driver