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Membrane pump

  • US 10,260,493 B2
  • Filed: 09/17/2015
  • Issued: 04/16/2019
  • Est. Priority Date: 09/17/2014
  • Status: Active Grant
First Claim
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1. A diaphragm pump (101, 102, 107, 109, 116, 123) comprising:

  • a pump housing (1),a disposable cell (2) that is releasably fixable to the pump housing, said disposable cell has a flexible first cell wall and a second cell wall (3, 4) which define an operating space (5) therebetween,an oscillating stroke drive,an operating diaphragm (6) drivingly connected to the oscillating stroke drive, said operating diaphragm (6) is connected at an operating diaphragm edge region to the pump housing and releasably coupleable with the flexible first cell wall (3) on a diaphragm flat side remote from the stroke drive, andat least one outlet port (12) is defined through the operating diaphragm (6) in an area radially inwardly from the operating diaphragm edge region providing a communication path into an interior of the pump housing on an opposite side of the operating diaphragm from the first flexible cell wall, and a return flow obstructer or a return flow preventer is connected to the operating diaphragm in the interior of the pump housing for evacuating a dead space (11) arranged between the operating diaphragm (6) and the flexible first cell wall (3).

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