F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
103/32
F04B 43/06 (2006.01)
Patent
CA 1249174
ABSTRACT OF THE DISCLOSURE A two-stroke pumping device for developing pulsatile fluid flow includes a housing with an internal resilient flexible element. The flexible element defines a pair of chambers within the housing, including a pumping chamber and a driving chamber. The pumping chamber is connected to a source of the fluid to be pumped and the driving chamber is connected to a pneumatic pressure source adapted to create a pressure differential across the flexible element. The device includes a means responsive to the flexure of the element in the ejection stroke to terminate that stroke and begin the filling stroke. The flexible element oscillates to generate repetitive ejection and filling strokes.
475954
Nehring John R.
Bard (c. R.) Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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