08870549 is referenced by 21 patents and cites 518 patents.

Reciprocating positive-displacement membrane pumps (which may be referred to hereinafter as “pods,” “pump pods,” or “pod pumps”) used to pump fluids, such as a biological fluid (e.g., blood or peritoneal fluid), a therapeutic fluid (e.g., a medication solution), or a surfactant fluid are disclosed. The speed of a pump stroke can be adjusted by altering a frequency of pressure pulses delivered to the pump membrane during a fill stroke or a delivery stroke of the pump. A pumping algorithm may divide a pump stroke into an initial pumping period and a end-of-stroke pumping period, with the pressure pulse duration being longer during the initial pumping period. This arrangement may allow for a minimum pump flow rate while also providing a pressure ripple that can be used to detect the end of a pump stroke.

Title
Fluid pumping systems, devices and methods
Application Number
13/657628
Publication Number
8870549 (B2)
Application Date
October 22, 2012
Publication Date
October 28, 2014
Inventor
Scott A Leonard
Bedford
NH, US
Michael J Wilt
Windham
NH, US
N Christopher Perry
Manchester
NH, US
James D Dale
Nashua
NH, US
Jason A Demers
Manchester
NH, US
Larry B Gray
Merrimack
NH, US
Brian D Tracey
Litchfield
NH, US
Agent
Wolf Greenfield & Sacks P C
Assignee
DEKA Products Partnership
NH, US
IPC
A61F 7/12
A61M 1/36
G01K 1/08
G01K 1/16
G01M 3/18
A61M 1/10
F04B 43/073
F04B 43/06
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