Internal combustion engines having double cylinder units
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United States of America Patent
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Jun 6, 2006
Grant Date -
Nov 18, 2004
app pub date -
Mar 12, 2004
filing date -
Mar 14, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An internal combustion engine may comprise at least one double cylinder (17). A piston (10, 12) is reciprocally movably disposed in each individual cylinder (14, 16) of the double cylinder and each piston is connected to a crankshaft (4). The pistons preferably reciprocate in the same direction within the individual cylinders. A cylinder space (19, 20) is defined within the cylinders above each piston head. Preferably, the cylinder spaces are formed such that the cylinder spaces communicate during at least a portion of the reciprocal movement of the pistons.
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