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. 26, 2002
Filed:
Apr. 12, 2000
Applicant:
Inventors:
Sheldon S. L. Chang, Port Jeff, NY (US);
Andrew Chang, Nashville, TN (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B 1/700 ; A61M 1/00 ;
U.S. Cl.
CPC ...
F04B 1/700 ; A61M 1/00 ;
Abstract
The invention herein is a ventricular assistive device (VAD) based on a progressive cavity pump. A progressive cavity pump does not use blades or fins to propel the blood. Instead, the pump stator and rotor are designed so that, when combined, there are a series of cavities formed between the pump rotor and the stator wall. Blood is carried through the pump chamber in these cavities when the rotor rotates. In the preferred embodiment of the invention, the cavities progress on a straight line path through the pump, providing an efficient and unobstructed channel for blood flow and minimizing the risk of thrombus.