David S Cassidy

US Patent:

6480257, Nov 12, 2002

Filed:

Dec 11, 2000

Appl. No.:

09/734108

Inventors:

David Cassidy - Chelmsford MA
Russell Hart - North Attleboro MA
John Landy - Billerica MA
Andrea Stamp - Gloucester MA

Assignee:

Belmont Instrument Corporation - Billerica MA

International Classification:

A61F 760

US Classification:

352470, 604113, 165 46

Abstract:

A heat exchanger that is useable in a wearable fluid heater is disclosed. Mechanisms may be used with or comprised in embodiments of the heat exchanger for purging gas from the heat exchanger.

US Patent:

7158719, Jan 2, 2007

Filed:

Jun 25, 2004

Appl. No.:

10/876824

Inventors:

David Cassidy - Chelmsford MA, US

Assignee:

Enginivity LLC - Lexington MA

International Classification:

F24H 1/10
H05B 3/28

US Classification:

392494, 392466

Abstract:

An improved inline intravenous fluid warming device. In one embodiment, the device includes a resistive film heater that is thermally coupled to a body having a serpentine fluid path extending therethrough. The film heater is coupled to the body via a first layer that is a thermally conductive and electrically insulative and a second layer that is thermally conductive. In another embodiment first and second resistive film heaters are employed to support either line power or battery powered operation.

US Patent:

7377148, May 27, 2008

Filed:

May 27, 2005

Appl. No.:

11/139892

Inventors:

David E. Cassidy - Chelmsford MA, US
Eric May - Norfolk MA, US
Richard Bucchianeri - Westford MA, US

Assignee:

Enginivity, LLC - Lexington MA

International Classification:

G01N 27/22
G01N 27/60

US Classification:

73 191, 73 1901, 73 6444

Abstract:

An air or gas bubble detection system detects the presence of liquid in intravenous (IV) tubing. By detecting the presence of liquid rather than gas, false alarms due to micro bubbles or small air gaps between the sensor and the tubing are avoided.

US Patent:

7547295, Jun 16, 2009

Filed:

May 27, 2005

Appl. No.:

11/140087

Inventors:

David E. Cassidy - Chelmsford MA, US

Assignee:

Enginivity, LLC - Lexington MA

International Classification:

A61M 35/00

US Classification:

604122, 604123, 604127, 604131

Abstract:

An active gas removal system is provided to remove air or gas bubbles from an intravenous fluid prior to infusion into the patient. The system detects the level of liquid in a drip chamber and occludes a downstream valve to the patient, thereby increasing pressure in the drip chamber sufficient to open a vent valve and release gas therein.

US Patent:

7695448, Apr 13, 2010

Filed:

May 27, 2005

Appl. No.:

11/139886

Inventors:

David E. Cassidy - Chelmsford MA, US
Eric May - Norfolk MA, US
Richard Bucchianeri - Westford MA, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

A61M 31/00

US Classification:

604 65

Abstract:

An intravenous flow control system provides closed loop control to maintain a desired flow rate. The actual flow rate is determined by two techniques, a geometrically based technique that uses geometric parameters of the IV system, and a thermally based technique that uses the power input to an IV fluid warmer and the temperature of the IV fluid entering and exiting the warmer.

US Patent:

7741815, Jun 22, 2010

Filed:

Nov 6, 2006

Appl. No.:

11/593456

Inventors:

David Cassidy - Chelmsford MA, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

H02J 7/04

US Classification:

320152, 320150, 320134, 320136, 392480, 392479, 219520, 219535

Abstract:

A lithium polymer (LiPo) battery pack having LiPo battery cells is provided which includes battery protection circuitry, charging circuitry, cell balancing circuitry, and control and communication circuitry. The batteries can be charged while in use by an internal charger. Battery charging and discharging are accomplished in a controlled and protected manner to avoid overcharging and overdischarging conditions. The novel battery pack has built-in safeguards against dangerous LiPo battery conditions and is implemented in a small, portable unit which contains the battery cells, control and protection circuitry, internal charger and display gauge. The battery pack is useful for powering an intravenous fluid warmer or other medical or electrical devices and equipment.

US Patent:

7865072, Jan 4, 2011

Filed:

Mar 21, 2006

Appl. No.:

11/385085

Inventors:

David E. Cassidy - Chelmsford MA, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

A61F 7/00

US Classification:

392470, 604113

Abstract:

A fluid warming device includes axially or longitudinally slidable covers that retain a removable heat exchange body in a housing in heat exchange communication with a heater assembly while allowing flow through the heat exchange body to be observed. In another aspect, a fluid warming system increases or decreases power to a heater assembly to adjust the fluid temperature to ensure that the fluid is at an appropriate temperature when it reaches the patient.

US Patent:

7956583, Jun 7, 2011

Filed:

Jun 21, 2010

Appl. No.:

12/820094

Inventors:

David Cassidy - Chelmsford MA, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

H02J 7/04

US Classification:

320152, 320150, 320154

Abstract:

A lithium polymer (LiPo) battery pack having LiPo battery cells is provided which includes battery protection circuitry, charging circuitry, cell balancing circuitry, and control and communication circuitry. The batteries can be charged while in use by an internal charger. Battery charging and discharging are accomplished in a controlled and protected manner to avoid overcharging and overdischarging conditions. The novel battery pack has built-in safeguards against dangerous LiPo battery conditions and is implemented in a small, portable unit which contains the battery cells, control and protection circuitry, internal charger and display gauge. The battery pack is useful for powering an intravenous fluid warmer or other medical or electrical devices and equipment.