US PATENT SUBCLASS 417 / 399
.~.~.~ Rectilinearly reciprocating cylinder and piston-type pump

Current as of: June, 1999
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417 /   HD   PUMPS

321  DF  MOTOR DRIVEN {32}
375  DF  .~ Fluid motor {9}
398  DF  .~.~ Rectilinearly reciprocating cylinder and piston-type motor {1}
399.~.~.~ Rectilinearly reciprocating cylinder and piston-type pump {2}
400  DF  .~.~.~.~> Interconnected moving cylinder and piston
401  DF  .~.~.~.~> Integral pump and motor pistons {2}

DEFINITION

Classification: 417/399

(under subclass 398) Apparatus in which the fluid motor drives a pump of the type comprising a cylinder and a piston, one of which is a movable pumping member and cooperates with the other to form an expansible pumping chamber, said pumping member partaking of an alternate to-and-fro motion in a straight line.