Engine of reciprocating piston type
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United States of America Patent
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May 3, 2005
Grant Date -
Sep 23, 2004
app pub date -
Oct 3, 2002
filing date -
Oct 4, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An engine of reciprocating piston type includes a cylinder block (4) with one or more cylinders (2), each of which receives a respective piston (10) and is defined by a respective cylinder barrel (8), which is integral with the reminder of the cylinder block. The outer surface of each cylinder barrel (8) carries a plurality of substantially circumferential discontinuous reinforcing ribs, each comprising a plurality of elongate projections (12) spaced apart by gaps (14). Each projection (12) in each rib is in registry with a gap in the or each adjacent rib, when viewed in the direction of the length of the associated cylinder barrel.
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