David C Walters

US Patent:

7741805, Jun 22, 2010

Filed:

Aug 14, 2007

Appl. No.:

11/838223

Inventors:

Xiaodong Zhang - Mason OH, US
Nick S. Kapsokavathis - Shelby Township MI, US
Mutasim A. Salman - Rochester Hills MI, US
David W. Walters - Sterling Heights MI, US
Xidong Tang - Sterling Heights MI, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

H02J 7/14
H02J 7/00
H02J 7/16

US Classification:

320104, 320132, 320152

Abstract:

An electrical power storage device provides power to crank an internal combustion engine. Thereafter available power from the electric power storage device to crank the engine again is continually updated. Remedial measures are invoked if the available power is less than a predetermined power threshold.

US Patent:

8111037, Feb 7, 2012

Filed:

Jun 27, 2008

Appl. No.:

12/147552

Inventors:

Xiaodong Zhang - Mason OH, US
Nick S. Kapsokavathis - Shelby Township MI, US
Yilu Zhang - Northville MI, US
David W. Walters - Sterling Heights MI, US
Xidong Tang - Sterling Heights MI, US
Mutasim A. Salman - Rochester Hills MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

H02J 7/14
H02J 7/00
G01N 27/416
H04B 1/38

US Classification:

320104, 320108, 320132, 320134, 320135, 324426, 324427, 455573

Abstract:

A method is provided for determining a battery's state-of-health. An initial battery voltage is measured after a first voltage drop during an initiation of an engine cranking phase. A battery voltage is monitored during the remainder of the engine cranking phase. A lowest battery voltage is determined during the remainder of the engine cranking phase. A determination is made if a voltage difference between the lowest battery voltage and the initial battery voltage at the initiation of the engine cranking phase is less than a voltage threshold. A low battery state-of-health is identified in response to the voltage difference being less than the voltage threshold.

US Patent:

42665280, May 12, 1981

Filed:

Dec 13, 1978

Appl. No.:

5/969023

Inventors:

David A. Barnhart - Madiera OH
Ronald L. Britt - Middletown OH
John E. Kroger - Centerville OH
David A. Walters - Middletown OH

Assignee:

The Celotex Corporation - Tampa FL

International Classification:

F24C 1520

US Classification:

126299D

Abstract:

A range hood for an enclosure, which may be either ducted or ductless, comprises a hood having an inner compartment, said inner compartment having an air inlet aperture and first and second air outlet apertures; a blower means disposed within said hood and adapted to draw air from said enclosure through said air inlet aperture into said inner compartment and to discharge the air from said inner compartment through said outlet apertures; a damper member mounted for movement between a first position blocking said first outlet aperture, sand a second position not blocking said first outlet aperture, said damper member being normally biased to said first, blocking position; a first means for selectively locking or unlocking said damper member in said first position; and a second means for selectively opening or closing said second outlet aperture, such that, when said second outlet aperture is open and said damper member is locked in said first position, the air drawn into said inner compartment by said blower means is discharged therefrom through said second outlet aperture and, when said second outlet aperture is closed and said damper member is not locked in said first position, the air drawn into said inner compartment by said blower means moves said damper member to said second position and is discharged out of said first outlet aperture.