Piston cooling device

Details Piston cooling device Piston cooling device

2007-07-03

2007-07-03

Cronin, Stephen K. (Department: 3747)

Internal-combustion engines

Cooling

Internal cooling of moving parts; e.g., hollow valves,...

Reexamination Certificate

active

11315251

ABSTRACT:
A cooling structure is a separate member from a structural portion of an engine. An oil injection pipe includes cooling oil injection holes for injecting cooling oil into cylinder bores and is mounted across an engine at a somewhat upper position with respect to a crank shaft and in parallel with the crank shaft. Both ends of the oil injection pipe are fixed through mounting members to right and left side walls of the engine, whereby the pipe is mounted. Two left and right pipe portions are joined together at a central position between the two to constitute the oil injection pipe as a single pipe. At the connection in the central position, the oil injection pipe is connected to an oil supply path. Oil supplied through the oil supply path flows into the left and right pipe portions and is injected from the injection holes into the cylinder bores.

REFERENCES:
patent: 3709109 (1973-01-01), Howe
patent: 4206726 (1980-06-01), Johnson, Jr. et al.
patent: 5092292 (1992-03-01), Iguchi et al.
patent: 6205971 (2001-03-01), Inumaru et al.
patent: 1 288 460 (2003-03-01), None
patent: 6-264742 (1994-09-01), None
patent: 2003-74347 (2003-03-01), None

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