The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 19, 1989
Filed:
May. 21, 1987
Alexander S Borsanyi, Newport Beach, CA (US);
Baxter International Inc., Deerfield, IL (US);
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.