Peristaltic pump
First Claim
1. A peristaltic pump for medical applications, comprising:
- a pump barrel having an interior bearing surface in the form of a circular arc;
at least one compressible tube capable of holding a liquid to be pumped and arranged in a radial pattern along the length of the bearing surface;
a rotor comprising a rotary chassis having rollers adapted to roll against the tube, whereby, the tube is compressed against the bearing surface; and
, piezoelectric drive means to turn the rotor.
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Accused Products
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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Citations
18 Claims
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1. A peristaltic pump for medical applications, comprising:
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a pump barrel having an interior bearing surface in the form of a circular arc; at least one compressible tube capable of holding a liquid to be pumped and arranged in a radial pattern along the length of the bearing surface; a rotor comprising a rotary chassis having rollers adapted to roll against the tube, whereby, the tube is compressed against the bearing surface; and
, piezoelectric drive means to turn the rotor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A peristaltic pump for medical applications, comprising:
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a pump barrel having an interior bearing surface in the form of a circular arc; at least one compressible tube capable of holding a liquid to be pumped and arranged in a radial pattern along the length of the bearing surface; a rotor comprising a rotary chassis having rollers adapted to roll against the tube, whereby, the tube is compressed against the bearing surface; and
,piezoelectric drive means to turn the rotor, the piezoelectric drive means comprising a vibrating stator, wherein the rollers are pressed against the tube by pressure against the vibrating stator, the vibrating stator having a circular peripheral surface, the vibration of which is achieved in accordance with a progressive wave, the vibration driving the rollers, wherein the rollers are pressed against the peripheral surface of the vibrating stator. - View Dependent Claims (18)
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Specification