F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
103/30
F04B 43/00 (2006.01) F04B 43/08 (2006.01)
Patent
CA 1255965
ABSTRACT A pump with a continuous inflow and a pulsating outflow comprises a first chamber and a second chamber with a passage between them and made from a flexible material, provided with an inlet to the first chamber and an outlet from the second chamber, the passage between the chambers being provided with a one-way valve permitting flow in direction from the first to the second chamber only, and a second one-way valve arranged at the outlet permitting flow out of the second chamber only. The chambers are movably supported in a pump casing with a first and a second opening, in that the inlet is connected to and penetrates the first opening, and in that the outlet is connected to and penetrates the second opening. Drive means cyclically affect the second chamber and reduce its volume under expulsion of the medium which is pumped while simultaneously affecting the walls of the first chamber causing its volume to increase and medium to flow through the inlet into the chamber. The drive means include a drivering surrounding said passage and fixed to it, and which drivering has surfaces engagable with the first and the second chamber walls in a way that the medium taken in between periods when the drive means is affecting the chamber walls controls the output of the pump by defining the receding movement of the drive ring, which movement is a function of the differential pressure force resulting from the difference in areas of engagement with the respective chamber wall on both sides of the drive ring.
518623
Astra-Tech Aktiebolag
Fetherstonhaugh & Co.
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