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:
Dec. 12, 1995
Filed:
Mar. 03, 1993
Applicant:
Inventors:
Robert J Bryant, Manchester, NH (US);
Dean Kamen, Bedford, NH (US);
Douglas E Vincent, Manchester, NH (US);
Assignee:
Deka Products Limited Partnership, Manchester, NH (US);
Primary Examiner:
Int. Cl.
CPC ...
A61M / ;
U.S. Cl.
CPC ...
210646 ; 73149 ; 210 90 ; 210103 ; 210134 ; 210241 ; 210742 ; 364564 ; 604 28 ; 604 29 ; 604 30 ; 604 31 ; 604 65 ; 604 67 ;
Abstract
Peritoneal dialysis systems and methods move liquid using a pump chamber that is operated in response to pneumatic pressure variations applied by a pump actuator. The systems and methods periodically measure air pressures in the actuator and an associated reference air chamber and derive from these a measurement of liquid volume moved through the pump chamber. The systems and methods minimize derivation errors by compensating for temperature differences among the pump chamber; the pump actuator; and the reference chamber.