US PATENT SUBCLASS 91 / 405
.~.~ Throttling (e.g., cushioning)

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

392  DF  WORKING MEMBER POSITION RESPONSIVE MOTIVE FLUID CONTROL {9}
404  DF  .~ Exhaust control {2}
405.~.~ Throttling (e.g., cushioning) {2}
406  DF  .~.~.~> Exhaust valve with bleed passage therein
407  DF  .~.~.~> By successively controlling or controlling less than all of plural exhaust passages {1}

DEFINITION

Classification: 91/405

(under subclass 404) Apparatus in which the exhaust is only partially closed in response to working member position or is progressively closed or throttled due to movement of the working member.

(1) Note. Many valves have an incidental throttling action when activated. A patent will not be classified under this definition on the basis of such incidental throttle action. However, a valve or porting which is specifically designed or modified to provide a throttling action is included under this definition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

396, for expansible chamber motors in which the working member carries a part which cooperates with an exhaust port formed in the working chamber end wall and acts to throttle said port in response to working member movement.