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Fluid pumping systems, devices and methods

  • US 10,302,075 B2
  • Filed: 10/27/2014
  • Issued: 05/28/2019
  • Est. Priority Date: 04/14/2006
  • Status: Active Grant
First Claim
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1. A flexible diaphragm for use in a reciprocating positive-displacement pump, the diaphragm configured to be interposed between a pumping chamber of the pump and a control chamber of the pump, and comprising a pre-formed hemispheroid membrane, the diaphragm having a pumping chamber side and an opposing control chamber side, and having a central region including a center of the diaphragm having a center point and surrounded by a peripheral region extending to a rim;

  • wherein the peripheral region and all of the central region of the diaphragm are formed of a flexible material and configured to flex in use so that a convexity of both the peripheral region and all of the central region inverts between a fluid delivery position and a fluid filling position of the diaphragm, and wherein a plurality of raised-elements are distributed over both the peripheral region and all of the central region of the pumping chamber side of the diaphragm, said raised elements comprising thickened portions of the diaphragm flanked by thinner portions of the diaphragm, so that in both the peripheral region and all of the central region, the thickened portions of the diaphragm contact a pumping chamber wall and the thinner portions of the diaphragm form contiguous fluid flow paths from the rim to the center point of the diaphragm when the diaphragm is fully extended against the pumping chamber wall.

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