F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F01 MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
F01M LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
F01M1/00 Pressure lubrication
F01M1/04 using pressure in working cylinder or crankcase to operate lubricant feeding devices