Craig Michael Lawrence

US Patent:

6468222, Oct 22, 2002

Filed:

Aug 2, 2000

Appl. No.:

09/630398

Inventors:

James R. Mault - Evergreen CO
Theodore W. Barber - Belmont CA
Craig M. Lawrence - Menlo Park CA
Timothy J. Prachar - Palo Alto CA
Jeffrey C. Weintraub - San Jose CA
Kevin S. Nason - Mountain View CA

Assignee:

HealtheTech, Inc. - Golden CO

International Classification:

A61B 508

US Classification:

600531, 600529, 600532, 600538

Abstract:

The present invention provides an indirect calorimeter for measuring the metabolic rate of a subject. The calorimeter includes a respiratory calorimeter configured to be supported in contact with the subject so as to pass inhaled and exhaled gases as the subject breathes. A flow pathway is operable to receive and pass inhaled and exhaled gases. A first end of the flow pathway is in fluid communication with the respiratory connector and a second end is in fluid communication with a source and sink for respiratory gases. A flow meter generates electrical signals as a function of the instantaneous flow volume of inhaled and exhaled gases passing through the flow pathway. A component gas concentration sensor generates electrical signals as a function of the instantaneous fraction of a predetermined component gas in the exhaled gases as the gases pass through the flow pathway. A computation unit receives the electrical signals from the flow meter and the component gas concentration sensor and calculates at least one respiratory parameter for the subject as the subject breathes through the calorimeter.

US Patent:

6899683, May 31, 2005

Filed:

May 31, 2002

Appl. No.:

10/161505

Inventors:

James R. Mault - Evergreen CO, US
Theodore W. Barber - Belmont CA, US
Craig M. Lawrence - Menlo Park CA, US
Timothy J. Prachar - Palo Alto CA, US
Jeffrey C. Weintraub - San Jose CA, US
Kevin S. Nason - Mountain View CA, US

Assignee:

Healthetech, Inc. - Golden CO

International Classification:

A61B005/08

US Classification:

600531, 600529, 600532, 600538, 73 233

Abstract:

An indirect calorimeter for measuring the metabolic rate of a subject includes a disposable portion and a reusable portion. The disposable portion includes a respiratory connector configured to be supported in contact with the subject so as to pass inhaled and exhaled gases as the subject breathes. The disposable portion also includes a flow pathway operable to receive and pass inhaled and exhaled gases, having a first end in fluid communication with the respiratory connector and a second end in fluid communication with a source and sink for respiratory gases. The disposable portion is disposed within the reusable portion, which includes a flow meter, a component gas concentration sensor, and a computation unit. The flow meter generates a signal as a function of the instantaneous flow volume of respiratory gases passing through the flow pathway and the component gas concentration sensor generates a signal as a function of the instantaneous fraction of a predetermined component gas in the exhaled gases. The computation unit receives the electrical signals from the flow meter and the concentration sensor and calculates at least one respiratory parameter for the subject as the subject breathes through the calorimeter.

US Patent:

6899684, May 31, 2005

Filed:

Jun 10, 2002

Appl. No.:

10/167349

Inventors:

James R. Mault - Evergreen CO, US
Theodore W. Barber - Belmont CA, US
Craig M. Lawrence - Menlo Park CA, US
Timothy J. Prachar - Palo Alto CA, US
Jeffrey C. Weintraub - San Jose CA, US
Kevin S. Nason - Mountain View CA, US

Assignee:

HealtheTech, Inc. - Golden CO

International Classification:

A61B005/08

US Classification:

600531, 600529, 600532, 600538

Abstract:

A method of determining a respiratory parameter for a subject using an indirect calorimeter is provided. The indirect calorimeter includes a respiratory connector for passing inhaled and exhaled gases, a flow pathway operable to receive and pass inhaled and exhaled gases having a flow tube within the flow pathway through which the inhaled and exhaled gases pass, a flow meter for determining an instantaneous flow volume of the inhaled and exhaled gases, a component gas concentration sensor for determining an instantaneous fraction of a predetermined component gas and a computation unit having a processor and a memory. The method includes the steps of initializing the indirect calorimeter and the subject breathing into the respiratory connector if the indirect calorimeter is initialized, sensing the flow volume of the inhaled and exhaled gases passing through the flow pathway using the flow meter and transmitting a signal representing the sensed flow volume to the computation unit. The method also includes the steps of sensing a concentration of a predetermined component gas as the inhaled and exhaled gases pass through the flow pathway using the component gas sensor, and transmitting a signal representing the sensed concentration of the predetermined component gas to the computation unit. The method further includes the steps of calculating at least one respiratory parameter for the subject as the subject breathes through the calorimeter using the sensed flow volume and the sensed concentration of the predetermined component gas, and providing the subject with the at least one respiratory parameter.

US Patent:

6955650, Oct 18, 2005

Filed:

May 31, 2002

Appl. No.:

10/161244

Inventors:

James R. Mault - Evergreen CO, US
Theodore W. Barber - Belmont CA, US
Craig M. Lawrence - Menlo Park CA, US
Timothy J. Prachar - Palo Alto CA, US
Jeffrey C. Weintraub - San Jose CA, US
Kevin S. Nason - Mountain View CA, US

Assignee:

HealtheTech, Inc. - Golden CO

International Classification:

A61B005/08

US Classification:

600531, 600529

Abstract:

An indirect calorimeter for measuring the metabolic rate of a subject includes a respiratory connector configured to be supported in contact with the subject so as to pass inhaled and exhaled gases as the subject breathes, a flow pathway, and a hygiene barrier positioned to block a predetermined pathogen from the exhaled gases. The indirect calorimeter also includes a flow pathway having a first end in fluid communication with the respiratory connector and a second end in fluid communication with a source and sink for respiratory gases. The flow pathway includes a flow tube through which the inhaled and exhaled gases pass, an outer housing surrounding the flow tube, and a chamber disposed between the flow tube and the first end. The indirect calorimeter also includes a flow meter configured to generate electrical signals as a function of the instantaneous flow volume of inhaled and exhaled gases passing through the flow pathway, and a component gas concentration sensor operable to generate electrical signals as a function of the instantaneous fraction of a predetermined component gas in the exhaled gases as the gases pass through the flow pathway. The indirect calorimeter further includes a computation unit operable to receive the electrical signals from the flow meter and the concentration sensor and operative to calculate at least one respiratory parameter for the subject as the subject breathes through the calorimeter.

US Patent:

7005206, Feb 28, 2006

Filed:

May 31, 2002

Appl. No.:

10/161558

Inventors:

Craig Lawrence - Menlo Park CA, US
Alexey Salamini - San Francisco CA, US
Bruce MacGregor - Palo Alto CA, US
David Bliven - Cupertino CA, US

Assignee:

Polyfuel, Inc. - Menlo Park CA

International Classification:

H01M 2/00
H01M 8/04

US Classification:

429 34, 429 23, 429 13, 429 6, 429 22, 429 25, 429 30

Abstract:

A fuel cell assembly including a membrane electrode assembly, an anode plate, a cathode plate, a removable fuel cartridge, and a fuel delivery system. The assembly includes an anode, a cathode, and a polymer electrolyte membrane having a fuel side and an oxygen side. The fuel cartridge includes an expandable fuel bladder for receiving liquid fuel, an expandable pressure member in contact with the bladder for maintaining a positive pressure on the bladder, and a sealable exit port in fluid communication with the bladder. The fuel delivery system delivers fuel from the cartridge to the fuel side of the membrane. An Interface, Control, and Regulator Circuit for Fuel Cell Powered Electronic Device.

US Patent:

7316855, Jan 8, 2008

Filed:

Dec 3, 2002

Appl. No.:

10/309954

Inventors:

Craig Lawrence - Menlo Park CA, US
Alexey Salamini - San Francisco CA, US
Bruce MacGregor - Palo Alto CA, US
David Bliven - Cupertino CA, US

Assignee:

Polyfuel, Inc. - Mountain View CA

International Classification:

H01M 8/00

US Classification:

429 34, 429 36, 429 38

Abstract:

A fuel cell assembly including a membrane electrode assembly, an anode plate, a cathode plate, a removable fuel cartridge, and a fuel delivery system. The assembly includes an anode, a cathode, and a polymer electrolyte membrane having a fuel side and an oxygen side. The fuel cartridge includes an expandable fuel bladder for receiving liquid fuel, an expandable pressure member in contact with the bladder for maintaining a positive pressure on the bladder, and a sealable exit port in fluid communication with the bladder. The fuel delivery system delivers fuel from the cartridge to the fuel side of the membrane. The removable fuel cartridge includes a rigid fuel container having a first container portion and a second container portion permanently enclosing the expandable fuel bladder and the expandable pressure member. The first container portion and the second container portion may be permanently affixed to one another with an adhesive.

US Patent:

7797765, Sep 21, 2010

Filed:

Dec 28, 2006

Appl. No.:

11/617291

Inventors:

Michael J. Musal - Soquel CA, US
Craig M. Lawrence - Menlo Park CA, US
Aaron A. Henningsgaard - Palo Alto CA, US
Eamon Briggs - Santa Cruz CA, US

Assignee:

Bell Sports, Inc. - Scotts Valley CA

International Classification:

A61F 9/02

US Classification:

2448

Abstract:

An eyewear system includes a frame having a lens channel configured to slidably receive the lens and an opening to allow the lens to be inserted into the lens channel. The system further includes a lens configured to be slidably received into the lens channel of the frame and a latch to releasably secure the lens in the frame.

US Patent:

7878128, Feb 1, 2011

Filed:

May 31, 2007

Appl. No.:

11/756158

Inventors:

Ronnie K. Watson - Flower Mound TX, US
Robert L. Stewart - Grapevine TX, US
Lopa Patel - Bedford TX, US
Jennifer Ellen Davis-Wilson - San Francisco CA, US
Craig M. Lawrence - Menlo Park CA, US
Steven Bishop - Mountain View CA, US
Emily Ma - Atherton CA, US
James Yurchenco - Palo Alto CA, US
Christian Cornelius - Stuttgart, DE
Phillip Stob - Fremont CA, US

Assignee:

Steelcase Development Corporation - Grand Rapids MI

International Classification:

A47B 3/00

US Classification:

108132, 108115, 2481886

Abstract:

A system includes a board having opposing surfaces and at least one leg connected to one surface of the board through a first pivotable fitting to allow the board and the leg to move between a first position wherein the board and the leg are substantially parallel and a second position wherein the board and the leg are substantially perpendicular. The system also includes a locking mechanism secured to the board through a second pivotable fitting at a first end and configured to rotate at a second end opposite the first end between a storage position extending parallel with the board and a work position extending perpendicular to the board.