Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
F01L31/00—Valve drive, valve adjustment during operation, or other valve control, not provided for in groups F01L15/00 - F01L29/00
F01L31/02—Valve drive, valve adjustment during operation, or other valve control, not provided for in groups F01L15/00 - F01L29/00 with tripping-gear; Tripping of valves
F01L31/04—Valve drive, valve adjustment during operation, or other valve control, not provided for in groups F01L15/00 - F01L29/00 with tripping-gear; Tripping of valves with positively-driven trip levers