Electric Boat Corporation

John J McGarvey

Alberto Franco

James S Smith

John H Chapman

Michael K Pasque

Marvin E Rosen

Scot A Slimon

Carl O Larson, Jr

Robert J Brozek

John D Trahan

Trahan D John

J Brozek Robert

Daniel Kane

Michael Salata

In the embodiments described in the specification, a permanent magnet machine includes a stator having windings which intercept flux received from peripheral pole pieces in a rotor generated by permanent magnets disposed between the pole pieces. In order to control the flux passing through the stator windings, flux shunts are provided between the pole pieces and a winding on the core of each flux shunt generates flux in the shunt in proportion to current supplied to the winding so as to decrease the flux from the magnets which can be diverted from the pole pieces through the shunt. Current is supplied to the flux shunt windings in accordance with the instantaneous difference between the wave shape of the output from the machine and a desired wave shape stored in a control unit. An encoder supplies a signal to the control unit indicating the instantaneous position of the rotor with respect to the stator.

Flux shunt wave shape control arrangement for permanent magnet machines

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

John J McGarvey