Peristaltic pump
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United States of America Patent
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-
Aug 15, 2000
Grant Date -
N/A
app pub date -
Apr 3, 1998
filing date -
Apr 4, 1997
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The invention is a peristaltic pump having a particularly simple construction and a low axial bulk. The pump (1) includes a rotor (20) having rollers (21,22,23) which roll against a tube (14) containing the liquid to be pumped. The compression of the tube presses the rollers against the circular peripheral surface (35) of a central vibrating stator (32) in the form of a disc or ring, which guides the rollers and causes them to turn. The stator (32) is set in vibration by piezoelectric means and vibrates by extension in its radial plane following a progressive wave. The chassis (24) of the rotor is devoid of a central drive shaft. Such a peristaltic pump is notably useful in the medical domain, in machines to be worn by a patient or implanted in the body of a human being or animal.
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