US PATENT SUBCLASS 123 / 312
.~ Engine cylinder having a reciprocating sleeve valve

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

311  DF  FOUR-CYCLE {19}
312.~ Engine cylinder having a reciprocating sleeve valve {2}
313  DF  .~.~> Having a junk ring seal
314  DF  .~.~> Having sleeve valve lubrication means

DEFINITION

Classification: 123/312

Engine cylinder having a reciprocating sleeve valve:

(under subclass 311) Subject matter in which the four-stroke engine utilizes a reciprocating sleeve to valve the intake or exhaust port. The sleeve is reciprocated in timed relationship with the movement of the piston in the cylinder.

(1) Note. The sleeve valve is usually cylindrical in shape.