U-clip for boltless blade retainer
Uncooled oilless internal combustion engine having uniform...
Unducted propeller including variable pitch blades for a...
Unidirectional energy converter engine
Unified rotary flow control valve for internal combustion...
Uniflow exhaust muffler
Uniform temperature, dual circuit engine cooling system
Uninterruptible oil supply system
Unique engine construction
Unit power plant
Unitary molded plastic valve seal
Universal downhole motor for driving a tool
Universal exhaust system for motorcycles
Universal heat shield
Universal muffler assembly
Universal rotary power-generating machine
Universal rotating machine for expanding or compressing a...
Unscrewing security device for containers
Upper crankshaft bearing lubrication system for two- cycle...
Upper cylinder area lubrication system