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PCE
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DIFF Subgroup
F01M 3/04

for upper cylinder lubrication only

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Lubrication specially adapted for engines with crankcase compression of fuel-air mixture, or for other engines in which lubricant is contained in fuel, combustion air, or fuel-air mixture > for upper cylinder lubrication only

CPC:

Lubrication specially adapted for engines with crankcase compression of fuel-air mixture or for other engines in which lubricant is contained in fuel, combustion air, or fuel-air mixture (separating lubricant from air or fuel-air mixture before entry into cylinder F01M11/08) > for upper cylinder lubrication only

No child classifications to compare. This is a leaf node in both IPC and CPC.