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:
Jul. 31, 1979
Filed:
Aug. 23, 1977
Valery I Shumakov, Moscow, SU;
Moisei A Lokshin, Moscow, SU;
Vadim V Vlasov, Moscow, SU;
Vitaly A Burynin, Moscow, SU;
Nikolai V Novikov, Moscow, SU;
Abstract
An artificial heart comprising at least one blood circulating pump having a transparent housing divided into two chambers by a diaphragm. One of the chambers is a hydraulic chamber having an inlet valve and an outlet valve which are connected to the circulatory system; the other chamber is a pneumatic chamber provided with a nipple for the intake and discharge of gas. The pump's pneumatic chamber has a transparent conductive coating, for example, of gold, applied onto the internal wall of said pneumatic chamber. Said coating and the surface of the blood circulating in the hydraulic chamber make up a capacitor whose capacity varies due to changes in the volume of the hydraulic chamber. Said capacitor serves as a blood volume transducer. The artificial heart includes a system for controlling the supply of gas to and the discharge of gas from the pneumatic chamber of said pump. The control system comprises an element which is sensitive to variations in the blood volume. Said sensitive element is an RC bridge. Said blood volume transducer is connected in one of the arms of said bridge. A blood volume indicator is connected to the output of the sensitive element.