US PATENT SUBCLASS 417 / 383
.~.~.~ Pulsator or fluid link

Current as of: June, 1999
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417 /   HD   PUMPS

321  DF  MOTOR DRIVEN {32}
375  DF  .~ Fluid motor {9}
379  DF  .~.~ With motive fluid generator {5}
383.~.~.~ Pulsator or fluid link {3}
384  DF  .~.~.~.~> Pneumatic
385  DF  .~.~.~.~> With means to supply or vent pulsator fluid {3}
389  DF  .~.~.~.~> Plural collapsible walls

DEFINITION

Classification: 417/383

(under subclass 379) Apparatus in which the means for increasing the pressure of the motive fluid comprises an enclosed chamber containing the motive fluid (i.e., pulsator fluid) the boundaries of said chamber being formed in part by a movable driving member (e.g., pulse pump piston) and the fluid motor working member (e.g., piston), said fluid being in a state of total confinement within the boundaries of said chamber during at least a portion of driving member movement, whereby movement of the driving member in one direction causes displacement of said fluid so as to transmit energy from the driving member through the medium of said fluid to said fluid motor working member, and at least a portion of said fluid returning from whence it came upon movement of the driven member in the opposite direction.

(1) Note. A manually operated driving member is included under this definition.