US PATENT SUBCLASS 91 / 290
.~.~ Working member traverses pilot port in working chamber side wall

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

218  DF  CYCLICALLY OPERABLE {34}
281  DF  .~ Working member controlled motive fluid for distributor motor {12}
290.~.~ Working member traverses pilot port in working chamber side wall {9}
291  DF  .~.~.~> Port controls separate motor for intermediate pilot valve {1}
293  DF  .~.~.~> With passage from port controlled by pilot valve {1}
295  DF  .~.~.~> Plural ports control relatively movable distributor motors
296  DF  .~.~.~> Constantly open exhaust from distributor working chamber
297  DF  .~.~.~> With passage for pilot fluid in working member {1}
299  DF  .~.~.~> With distributor reversal by fluid compressed by working member
300  DF  .~.~.~> With distributor reversal by constantly supplied motive fluid
301  DF  .~.~.~> With control of distributor motor supply or exhaust port by distributor working member
302  DF  .~.~.~> Pilot port relieved into working chamber having working member controlled exhaust port

DEFINITION

Classification: 91/290

(under subclass 281) Apparatus in which a passage is provided to convey motive fluid to or convey exhaust fluid from a distributor motor working chamber, said passage receiving motive fluid from the output motor working chamber or receiving exhaust fluid from the distributor motor working chamber and being connected to a port in the output motor working chamber wall which is controlled by the reciprocatory motion of the output motor working member.

(1) Note. The "distributor motor" under this definition may be a motor operating a pilot valve for the motor which operates the distributor.