Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1987-05-21
1989-09-19
Yasko, John D.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
128DIG12, A61M 500
Patent
active
048677442
ABSTRACT:
A peristaltic pump equipped with a series of rollers eccentrically mounted upon a drive shaft, the pump also includes an elastomeric fluid delivery tube supported to extend in a direction parallel with the axis of the drive shaft. Each roller has a generally cylindrical outer surface equipped with a concentric annular rim that projects radially outwardly beyond the cylindrical surface and is rounded and smoothly tapered when viewed in longitudinal section. The rims of successive rollers are equally spaced and the rim diameter of each eccentric roller is sufficiently large to occlude a section of the tube when that roller is at its perigee with respect to the tube, at which time the adjacent cylindrical surface of the same roller also engages the tube but causes only limited non-occlusive deformation of that tube. The apparatus is particularly useful as a blood pump.
REFERENCES:
patent: 1874667 (1931-08-01), Wada
patent: 2483924 (1949-10-01), Moulinier
patent: 3609069 (1971-09-01), Martinelli
patent: 3981633 (1976-09-01), Wall
patent: 3990444 (1976-11-01), Vial
patent: 4373525 (1983-02-01), Kobayashi
patent: 4482347 (1984-11-01), Borsanyi
patent: 4617014 (1986-10-01), Cannon et al.
Baxter International Inc.
Dahl Debra E.
Lungmus John B.
Yasko John D.
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