Floating valve stem seal
Flow control valve for hot pitch or other viscous material
Fluid activated vibratory device
Fluid engine valve
Fluid feeder for pressurized fluid systems
Fluid metering valve structure
Fluid operable engine
Fluid pressure operated piston engine assembly
Fluid pressure powered apparatus
Fluid-operated reciprocating motors
Fluidic fuel injection with bistable valve
Force transmission device with a hydraulic valve-clearance...
Force transmitting member
Forced coaxially ventilated two stroke power plant
Four-stroke internal combustion engine
Frictionless rocker arm fulcrum assembly
Frustoconical valve stem sealing element
Fuel regulating intake valve
Gas exchange valve having corrosion protection layer
Gasket for a valve in an internal combustion engine