US PATENT SUBCLASS 91 / 265
.~ Relatively movable inlet and exhaust valves

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

218  DF  CYCLICALLY OPERABLE {34}
265.~ Relatively movable inlet and exhaust valves {6}
266  DF  .~.~> Oscillating working member
267  DF  .~.~> Lost motion drive from inlet to exhaust valve
268  DF  .~.~> Exhaust valve closed or held closed by inlet fluid (442)
269  DF  .~.~> Biased valve with trip
270  DF  .~.~> Inlet and exhaust valve movable about an axis
271  DF  .~.~> Reciprocating inlet and exhaust valves {1}

DEFINITION

Classification: 91/265

(under subclass 218) Apparatus in which the distributor comprises movable inlet and exhaust valve means for controlling motive fluid flow to and from an expansible chamber, said valve means cyclically moving relative to one another as a consequence of operation of the motor.

SEE OR SEARCH THIS CLASS, SUBCLASS:

222+, for cyclically operable expansible chamber motors having independent inlet and exhaust valves, one of which is provided to control a motive fluid passage entirely within the piston or piston rod, and especially subclass 228 for such motors in which the piston carries separate inlet and exhaust valves.

236+, for cyclically operable expansible chamber motors having multiple exhaust passages for an expansible chamber, one of which exhausts, or continues to exhaust after another is closed.

247+, for cyclically operable expansible chamber motors having movable relatively adjustable plural fluid control elements with means to adjust said elements so as to vary the timing of fluid control events.

325, for cyclically operable expansible chamber motors having a movable inlet or exhaust valve and a working member controlled exhaust or inlet port, respectively.

330+, for cyclically operable expansible chamber motors with independently operable means to move or adjust movement of the distributor. 454+, for expansible chamber motors, other than those which are cyclically operable, having relatively movable inlet and exhaust valves for a single chamber.