US PATENT SUBCLASS 123 / 63
.~ Four-cycle


Current as of: June, 1999
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123 /   HD   INTERNAL-COMBUSTION ENGINES

*  DD  DOUBLE-ACTING {2}
63.~ Four-cycle


DEFINITION

Classification: 123/63

Internal-combustion engines working on the four-stroke cycle, hereinafter defined, in which successive burned charges act alternately upon opposite sides of a single reciprocating piston moving in a single cylinder.