US PATENT SUBCLASS 91 / 272
.~.~.~ Codirectional with working member movement

Current as of: June, 1999
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91 /   HD   MOTORS: EXPANSIBLE CHAMBER TYPE

218  DF  CYCLICALLY OPERABLE {34}
265  DF  .~ Relatively movable inlet and exhaust valves {6}
271  DF  .~.~ Reciprocating inlet and exhaust valves {1}
272.~.~.~ Codirectional with working member movement {1}
273  DF  .~.~.~.~> Axially seating valves

DEFINITION

Classification: 91/272

(under subclass 271) Apparatus in which the path of reciprocating movement of both the inlet and exhaust valve means is in alignment with or parallel to the path of movement of the motor working member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

228, for a cyclically operable motor having a piston which carries relatively movable valves for inlet and exhaust, said valves usually moving relative to the piston codirectional to the movement of the piston.