FI main group (Note)/(Index) list

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惻maingroup Valve-gear or valve arrangements specially adapted for steam engines, or specially adapted for other positive-displacement machines or engines with variable—working-fluid distribution

Note(s)
    Groups F01L 15/00-F01L 31/00 cover:
      valve drive or means external to valves for adjustment during operation;tripping-gear;reversing-gear;use of pistons or piston-rods as valves or as valve-supporting elements;valve-gear or valve arrangements peculiar to free-piston machines or engines.
    Groups F01L 15/00-F01L 31/00 do not fully cover subject matter restricted to rotary, oscillatory, or lift-valve gear or valve arrangements, which is covered by group F01L 33/00 or F01L 35/00.