Internal-combustion engines – Lubricators – Crankcase – pressure control
Patent
1987-04-27
1989-05-23
Smith, Leonard E.
Internal-combustion engines
Lubricators
Crankcase, pressure control
123196R, 92156, 92159, 184 65, F01M 300
Patent
active
048319791
ABSTRACT:
A wrist pin lubricating system for a multi-cylinder two-cycle engine comprises a passage system for collecting and distributing crankcase condensate to the piston wrist pin bearings. A slot in each piston skirt provides continuous communication between each wrist pin bearing and a passage in the cylinder wall delivering condensate from the engine crankcases. The condensate is collected at the low point of each crankcase and is pumped to the wrist pin bearings by the pressure differential between two crankcases. Check valves are provided in the passages to maintain a directional flow of the condensate.
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DuBois Chester G.
Haman David F.
Outboard Marine Corporation
Smith Leonard E.
Synnestvedt John T.
Weber Richard D.
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