F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F01 MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
F01L CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
F01L7/00 Rotary or oscillatory slide valve-gear or valve arrangements
F01L7/02 with cylindrical, sleeve, or part-annularly shaped valves
F01L7/028 having the rotational axis coaxial with the cylinder axis and the valve surface not surrounding piston or cylinder