Electric Boat Corporation

Marvin E Rosen

James S Smith

John H Chapman

Alberto Franco

Michael K Pasque

John J McGarvey

Carl O Larson, Jr

Scot A Slimon

Robert J Brozek

John D Trahan

Trahan D John

Vladimir Odessky

Michael J Lubas

David Atwell

J Brozek Robert

In the particular embodiments of the invention described in the specification, a first signal generator produces a signal which changes in cycles having approximately straight line segments between maximum and minimum values at a first rate and a second signal generator produces a signal which changes in cycles having approximately straight line segments at a second rate which is an order of magnitude greater than the first rate. The maximum level of the second signal during any cycle is dependent upon the instantaneous signal level of the first signal and the minimum level of the second signal during any cycle is dependent upon a selected fraction of the instantaneous signal level of the first signal. The second signal is used to control the speed of a motor in a continuously changing random manner.

Continuously changing random signal generating arrangement and method

In one embodiment described in the specification, a surgically implantable reciprocating pump employs a check valve as the piston, which is driven by a permanent magnet linear electric motor to assist either side of the natural heart. The pump is implanted in the aorta or pulmonary artery using vascular attachment cuffs such as flexible cuffs for suturing at each end with the pump output directly in line with the artery. The pump is powered by surgically implanted rechargeable batteries. In another embodiment, pairs of pumps are provided to replace or assist the natural heart or to provide temporary blood flow throughout the body, for example, during operations to correct problems with the natural heart.

Implantable device monitoring arrangement and method

Electrical circuit for equipment requiring redundant flow paths and

Reciprocating pump with imperforate piston

Connecting arrangement for medical device

Reciprocating pump circulatory assist arrangement

Surgically implantable power supply

Artificial heart and method of maintaining blood flow

Reciprocating pump and linear motor arrangement

Surgically implantable pump arrangement and method for pumping body

Growing community of inventors

Elizabeth, NJ, United States of America

Marvin E Rosen