Alexander A Dolgin

US Patent:

6772011, Aug 3, 2004

Filed:

Aug 20, 2002

Appl. No.:

10/224118

Inventors:

Alexander Dolgin - Lexington MA

Assignee:

Thoratec Corporation - Pleasanton CA

International Classification:

A61N 108

US Classification:

607 61, 607 60

Abstract:

An implanted medical apparatus and external power source use the same coils for energy transfer to the implanted medical device as used for transmission of control signals from the implanted device. In one example, implanted circuitry generates a feedback control signal indicative of the load voltage level of a load-generating medical device and superimposes the feedback signal on an inductor capacitor (LC) tank circuit for detection by the external powering apparatus. The external powering apparatus uses the feedback signal to control the energy transfer to the implanted medical device, thus regulating the load voltage at the load-generating medical device. The feedback control signal may be a sequence of pulses whose frequency indicates the load voltage level. Other information besides load voltage level may also be transmitted from the implanted device, such as telemetry and logic information.

US Patent:

20020123777, Sep 5, 2002

Filed:

Dec 4, 2001

Appl. No.:

10/004731

Inventors:

Alexander Dolgin - Lexington MA, US
Thomas Rintoul - Gold River CA, US

International Classification:

A61N001/08

US Classification:

607/060000

Abstract:

A device, system and method for transcutaneous energy transfer (TET). Implanted circuitry suitable for conditioning the power delivered transcutaneously may be constructed in planar fashion, may be located in or near an implanted coil, and may be oriented such that the plane of the circuitry is substantially tangent to the lines of magnetic flux. The orientation of the circuitry may reduce eddy currents and their potentially harmful effects.

US Patent:

6327504, Dec 4, 2001

Filed:

May 10, 2000

Appl. No.:

9/567942

Inventors:

Alexander Dolgin - Lexington MA
Thomas C. Rintoul - Gold River CA

Assignee:

Thoratec Corporation - Pleasanton CA

International Classification:

A61N 102

US Classification:

607 61

Abstract:

A device, system and method for transcutaneous energy transfer (TET). Implanted circuitry suitable for conditioning the power delivered transcutaneously may be constructed in planar fashion, may be located in or near an implanted coil, and may be oriented such that the plane of the circuitry is substantially tangent to the lines of magnetic flux. The orientation of the circuitry may reduce eddy currents and their potentially harmful effects.

US Patent:

53040937, Apr 19, 1994

Filed:

Jan 17, 1992

Appl. No.:

7/822088

Inventors:

Gordon P. Sharp - Newton MA
Rodney R. Stewart - Littleton MA
Alexander Dolgin - Lexington MA

Assignee:

Phoenix Controls Corporation - Newton MA

International Classification:

B08B 1502

US Classification:

454 61

Abstract:

A method and apparatus for controlling a fluid flow valve with a linear control loop such that the error signal utilized to actuate a variable rate controller for moving a valve control element or for controlling another valve control parameter is the same for a given control parameter change regardless of the current control parameter value or the current or desired fluid flow through the valve. A non-delayed indication of current fluid flow is also generated.