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. 07, 1999
Filed:
Oct. 30, 1997
Applicant:
Inventors:
Mark P Sahlin, Hainesville, IL (US);
Timothy J Patno, Mundelein, IL (US);
Assignee:
Baxter International Inc., Deerfield, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
417 443 ;
Abstract
A controller for a peristaltic pump receives as an input pressure P.sub.i sensed at the inlet of the pump. The controller derives a nonlinear scale factor S.sub.Pi that varies as a step function with P.sub.i. The scale factor S.sub.Pi equals a first nonvariable value when P.sub.i lays in a first defined zone of inlet pressures, and equals a second nonvariable value, different than the first nonvariable value, when P.sub.i lays in a second defined zone of inlet pressures different than the first defined zone of inlet pressures. The controller generates a pump speed command based, at least in part, upon S.sub.Pi.