Crankcase scavenged internal combustion engine

Details Crankcase scavenged internal combustion engine Crankcase scavenged internal combustion engine

2006-07-25

2006-07-25

Argenbright, Tony M. (Department: 3747)

Internal-combustion engines

Lubricators

Crankcase, pressure control

C123S1960CP, C184S001500, C184S011200, C184S046000

Reexamination Certificate

active

07080620

ABSTRACT:
An internal combustion engine including structure for lubricating at least one bearing disposed therein. The engine includes an engine housing including a cylinder with a reciprocating piston of the engine and a crankcase volume with a crankshaft having the at least one bearing operatively connected thereto, wherein the crankcase volume contains at least air and a lubricant. Additionally, the engine includes a counterweight arrangement that provides an essentially solid circular profile, at least one passageway on the counterweight arrangement extending to a location adjacent to the engine housing, and at least one passageway extending through the engine housing from a location adjacent to the counterweight to the at least one bearing, wherein the two passageways are selectably aligned by movement of the piston to cause a lubricating flow between the at least one bearing and the crankcase volume.

REFERENCES:
patent: 5887678 (1999-03-01), Lavender
patent: 6223713 (2001-05-01), Moorman et al.
patent: 6810849 (2004-11-01), Hirsch et al.
patent: 0 887 520 (1998-12-01), None
patent: 0 962 630 (1999-12-01), None
patent: 1 134 366 (2001-09-01), None

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