Internal-combustion engines – Cooling – With jacketed head and/or cylinder
Reexamination Certificate
2005-05-31
2005-05-31
Yuen, Henry C. (Department: 3747)
Internal-combustion engines
Cooling
With jacketed head and/or cylinder
C164S369000
Reexamination Certificate
active
06899064
ABSTRACT:
A cylinder block has a number of cylinder bores and a water jacket at least partially surrounding the bores. When casting a cylinder block the water jacket is formed by a slender wall of a sand core. To enable the wall to be removed from the core box the wall must taper over its entire height. Prior art water jackets therefore taper from a minimum sand core wall width at the base to a large width at the top. The cylinder block of the invention has a water jacket which, when viewed in transverse section, is wider in an intermediate portion than at either its top or base. In providing a water jacket which is narrower at the top, there is more room for the addition of machined features on the top deck. Furthermore, a water jacket which is narrower at the base can have a greater depth than conventional water jackets.
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Machine Translation of JP 08-303295A to Masahisa Kamiya, published Nov. 19, 1996.
Hughes Frank G.
Jackson Richard
Ali Hyder
Cheek John J.
Finnegan Henderson Farabow Garrett & Dunner
Perkins Engines Company Limited
Yuen Henry C.
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