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. 03, 1991
Filed:
Mar. 14, 1989
Applicant:
Inventors:
Fredric L Milder, Brookline, MA (US);
Saul Stricker, Richmond Hill, CA;
Assignee:
Abiomed, Inc., Danvers, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61B / ;
U.S. Cl.
CPC ...
600 16 ; 600 18 ; 604 67 ; 604 96 ; 606192 ; 606194 ;
Abstract
A system for detecting leakage in a device having a fluid-driven membrane inserted in the body, for example, a balloon pump, includes a fluid drive circuit with a moisture remover having a capacity just sufficient to remove water vapor entering the circuit due to intrinsic permeability of the membrane. An in-line humidity sensor responds quickly to an increase in vapor pressure, indicating a leak, and activates a shut-down circuit to prevent leakage of the drive fluid into the body. The system is employed in a balloon pump driven by a pulsating air source.