Joseph F Freiman

US Patent:

6950729, Sep 27, 2005

Filed:

May 21, 2001

Appl. No.:

09/862781

Inventors:

Nathan Mitchell - The Woodlands TX, US
Joseph F. Freiman - Cypress TX, US

International Classification:

G05D011/00

US Classification:

700286, 700195, 423439, 428402, 428570, 428627, 428634, 429 42, 429 44

Abstract:

A portable electronic system which obtains power from a dry-electrolyte fuel cell. Water which is produced by the fuel cell is atomized by an ultrasonic transducer, to avoid user inconvenience due to reservoirs or dripping.

US Patent:

7688021, Mar 30, 2010

Filed:

Aug 26, 2005

Appl. No.:

11/213210

Inventors:

Joseph F. Freiman - Cypress TX, US
Thomas P. Sawyers - Hempstead TX, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

H01M 10/44
H02J 7/00
H01M 8/04
H02J 1/10

US Classification:

320101, 320138, 320132, 429 22, 429 23, 307 44, 307 60

Abstract:

In at least some embodiments, a system comprises a load and a fuel cell coupled to said load, the fuel cell being configured to provide a constant power level to said load. The system further comprises a battery coupled to said load and configured to provide power in excess of said constant power level to said load, if needed by said load.

US Patent:

57640289, Jun 9, 1998

Filed:

Dec 15, 1995

Appl. No.:

8/572963

Inventors:

Joseph F. Freiman - Cypress TX
Steven Kent McConkey - Houston TX
Nathan Austin Mitchell - The Woodlands TX

Assignee:

Compaq Computer Corporation - Houston TX

International Classification:

H02J 700

US Classification:

320106

Abstract:

A battery pack for use in a portable computing system includes a transistor that is used both for inhibiting charging of the batteries within the system and for limiting the voltage across the batteries in the battery pack. Rather than having two separate devices to inhibit and regulate, this single transistor performs the functions of both, thus reducing component count in a battery pack.

US Patent:

60207221, Feb 1, 2000

Filed:

Jun 30, 1997

Appl. No.:

8/885277

Inventors:

Joseph F. Freiman - Cypress TX

Assignee:

Compaq Computer Corporation - Houston TX

International Classification:

H02J 700

US Classification:

320164

Abstract:

A method for charging nickel metal hydride and comparable batteries, in which the applied voltage is clamped to a temperature-dependent and current-dependent value which is greater than the constant voltage during most of the charging cycle, but less than any voltage at which gassing can occur.

US Patent:

58618120, Jan 19, 1999

Filed:

Dec 18, 1996

Appl. No.:

8/768477

Inventors:

Nathan Austin Mitchell - The Woodlands TX
Joseph F. Freiman - Cypress TX
Steven Kent McConkey - Houston TX

Assignee:

Compaq Computer Corporation - Houston TX

International Classification:

G08B 2100
H02J 704

US Classification:

340636

Abstract:

A removable battery pack for powering a pen-based or portable computer system in which the battery pack blocks its terminals when inserted into an unknown system. The known system includes a power supply microcontroller which passes battery charge data back and forth between a memory located in the battery pack and the power supply microcontroller. A battery microcontroller, located in the battery pack, eavesdrops drops on the communication between the power supply microcontroller and the memory, and when it validates a known signature of this communication, the battery microcontroller then enables the terminals of the battery pack. A trickle discharge current flows from the battery pack whenever the battery pack is out of the known system to allow the power supply microcontroller to power up in the case of a dead auxiliary battery.

US Patent:

60182296, Jan 25, 2000

Filed:

Jun 30, 1997

Appl. No.:

8/884928

Inventors:

Nathan Mitchell - The Woodlands TX
Joseph F. Freiman - Cypress TX
Thomas Sawyers - Houston TX

Assignee:

Compaq Computer Corporation - Houston TX

International Classification:

H02J 700

US Classification:

320112

Abstract:

A sealed rechargeable lithium-ion battery pack which includes a switching voltage regulator. The regulator uses the normal cutoff transistors as the switching devices, and also includes a discrete inductor in the battery pack. The regulator is operated with programmable voltage and current parameters, under control of a microcontroller which is also inside the sealed battery pack enclosure.

US Patent:

52006891, Apr 6, 1993

Filed:

Jan 24, 1992

Appl. No.:

7/824935

Inventors:

Armando Interiano - Houston TX
Randall L. Hess - Cypress TX
Patrick R. Cooper - Houston TX
Joseph F. Freiman - Cypress TX

Assignee:

Compaq Computer Corporation - Houston TX

International Classification:

H02J 700

US Classification:

320 20

Abstract:

A battery charge controller and fuel gauge which accurately monitors the voltage, temperature, and charge and discharge current of a rechargeable battery, and calculates the battery's charge capacity and charge level. Each time the battery is fully discharged, any calculated charge level remaining is divided by subtracted from the previously calculated charge capacity. When the battery is fully charged, the charge level is set equal to the charge capacity. During subsequent charge and discharge, the current is converted to a coulomb count and added or subtracted from the charge level to maintain an accurate charge level. Fast charge inefficiency due to temperature is considered by subtracting a temperature proportional factor before the charge level of the battery is updated. The charge level, voltage and temperature are used to determine the optimal fast charge termination point to achieve full charge and prevent temperature abuse and overcharge. A fast charge is applied only if the battery is within proper voltage and temperature ranges.

US Patent:

58313508, Nov 3, 1998

Filed:

Dec 15, 1995

Appl. No.:

8/573029

Inventors:

Steven Kent McConkey - Houston TX
Nathan Austin Mitchell - The Woodlands TX
Joseph F. Freiman - Cypress TX

Assignee:

Compaq Computer Corporation - Houston TX

International Classification:

H02J 700

US Classification:

307150

Abstract:

A computer system is powered by a battery pack, the battery pack including either nickel-based batteries or lithium-ion based batteries. Either of the two battery packs can be interchanged without modification to the system.