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:
Mar. 14, 1995
Filed:
Jul. 30, 1992
Willem J Kolff, Salt Lake City, UT (US);
Stephen R Topaz, Salt Lake City, UT (US);
N Dan Bishop, Salt Lake City, UT (US);
University of Utah Research Foundation, Salt Lake City, UT (US);
Abstract
A method for providing ventricular assist to a patient with a weak or nonfunctional heart includes attaching an artificial ventricle to a patient and pumping said artificial ventricle with a muscle powered hydraulic pump. This method is enhanced by supplementing said artificial ventricle as needed with a pneumatic pumping system which is hermetically sealed from the hydraulic fluid. The hydraulic pumping power is amplified by driving a first pumping member of larger dimension against a second pumping member of smaller dimension to thereby supply increased force to overcome existing blood pressure.