Rotator for IC engine poppet valves - comprises cam bearing eccentrically on rotatable disc on top of valve stem when valve is lifted

摘要

The mechanism for periodically rotating IC engine poppet valves has a disc at the top of the valve stem, free to rotate relative to the valve spring, via which a rotational force is applied while the valve is off its seat. This force is exerted frictionally by a cam (8) on a shaft (9) above the disc (3), rotating to tighten the threaded connection between disc and stem. The spring carrier (6) is cup-shaped with a central sleeve, providing guiding surfaces for both the assembly (10) and itself (11).