• All sections
• F - Mechanical engineering; lighting; heating; weapons; blasting
• F02B - Internal-combustion piston engines; combustion engines in general
• F02B 33/12 - Engines with reciprocating-piston pumps; Engines with crankcase pumps with reciprocating-piston pumps other than simple crankcase pumps with the pumping cylinder situated between working cylinder and crankcase, or with the pumping cylinder surrounding working cylinder the rear face of working piston acting as pumping member and co-operating with a pumping chamber isolated from crankcase, the connecting-rod passing through the chamber and co-operating with movable isolating member

Patent holdings for IPC class F02B 33/12

Total number of patents in this class: 19

10-year publication summary

Principal owners for this class