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PUMP CHAMBER CONFIGURED TO CONTAIN A RESIDUAL FLUID VOLUME FOR INHIBITING THE PUMPING OF A GAS

  • US 20130343936A1
  • Filed: 08/22/2013
  • Published: 12/26/2013
  • Est. Priority Date: 07/20/1999
  • Status: Active Grant
First Claim
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1. A pump chamber for pumping fluid, comprising:

  • a movable membrane positioned opposite a rigid inner wall to form the pump chamber, the membrane configured and positioned within the pump chamber to move fluid out of the pump chamber through an outlet of the pump chamber as the membrane moves toward the inner wall from a first position to a second, fully extended position, wherein when in the second position, at least a portion of the membrane is prevented from contacting the inner wall so that a residual volume able to contain fluid remains within the pump chamber.

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