US PATENT SUBCLASS 417 / 140
.~.~.~.~ Movable pumping chamber

Current as of: June, 1999
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417 /   HD   PUMPS

65  DF  ONE FLUID PUMPED BY CONTACT OR ENTRAINMENT WITH ANOTHER {10}
118  DF  .~ Liquid pumped by supplying or exhausting gaseous motive fluid to or from pumping chamber {7}
137  DF  .~.~ Cyclic pumping {5}
139  DF  .~.~.~ Control by condition of pumped fluid {3}
140.~.~.~.~ Movable pumping chamber

DEFINITION

Classification: 417/140

(under subclass 139) Apparatus having a movably mounted means adapted to receive the fluid which is pumped and adapted to move in response to a quantity of fluid received to control the mechanism by which the fluid which is pumped is admitted to or ejected from the pump chamber.

(1) Note. The pump chamber may be the movably mounted means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

124, for devices having plural interrelated pumping chambers which include a means to sense the weight received of fluid which is pumped to control the pumping operation of the chambers.