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:
Jan. 03, 1989
Filed:
Aug. 24, 1987
Applicant:
Inventors:
John R Prybella, Lakewood, CO (US);
Terry D Boucher, Littleton, CO (US);
Assignee:
Cobe Laboratories, Inc., Lakewood, CO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B / ; A61M / ; B04B / ;
U.S. Cl.
CPC ...
417 43 ; 417 45 ; 604-6 ; 494-1 ;
Abstract
A pump control apparatus including a variable speed pump controllable in response to a pump drive signal, a signal generator generating a commanded flowrate signal indicating desired flowrate of the pump, a flowrate sensor providing a sensed flowrate signal indicating sensed flowrate of the pump, and an integrator connected to the sensor and generator to receive and integrate the commanded flowrate signal and the sensed flowrate signal and to provide the pump drive signal based on the difference in integrated values of the signals so as to achieve desired commanded volume over time.