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PCE
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DIFF Subgroup
F01L 31/08

Valve drive or valve adjustment, apart from tripping aspects; Positively-driven gear

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Valve drive, valve adjustment during operation, or other valve control, not provided for in groups > Valve drive or valve adjustment, apart from tripping aspects; Positively-driven gear

CPC:

Valve drive, valve adjustment during operation, or other valve control, not provided for in groups F01L15/00 - F01L29/00 (sensing elements measuring the variable or condition to be controlled or regulated F01B25/04) > Valve drive or valve adjustment, apart from tripping aspects; Positively-driven gear

Of 5 combined children, 4 exist in both systems.

1 codes exist only in IPC.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • F01L 31/14 Valve adjustment by links or guide rods, e.g. in valve-gears with eccentric drive IPC+CPC Available in IPC and CPC
  • F01L 31/16 the drive being effected by specific means other than eccentric, e.g. cams; Valve adjustment in connection with such drives IPC+CPC Available in IPC and CPC
  • F01L 31/18 specially for rotary or oscillatory valves IPC+CPC Available in IPC and CPC