David A Howell

US Patent:

6917870, Jul 12, 2005

Filed:

Aug 14, 2003

Appl. No.:

10/604753

Inventors:

David W. Howell - Emmaus PA, US
Charles E. Eberling - Wellington OH, US
William P. Amato - Avon OH, US

Assignee:

Bendix Commercial Vehicle Systems LLC - Elyria OH

International Classification:

G06F007/00

US Classification:

701 82, 701 83

Abstract:

An interrupt for an automatic traction control system includes a park brake control valve for controlling a park brake of a vehicle as a function of a park brake control pressure signal. A service brake control valve controls a service brake as a function of a service brake control pressure signal. A traction control valve communicates the service brake control pressure signal to the service brake control valve as a function of the park brake control pressure signal.

US Patent:

8123306, Feb 28, 2012

Filed:

Sep 30, 2008

Appl. No.:

12/286536

Inventors:

Keith Alan Hurlburt - Macungie PA, US
David Willard Howell - Macungie PA, US

Assignee:

Volvo Group North America, LLC - Greensboro NC
Bendix Commercial Vehicle Systems LLC - Elyria OH

International Classification:

B60T 13/40

US Classification:

303 7, 303 71

Abstract:

A truck includes a pressurized air supply system for providing air to one of a plurality of air supply connections and a selector circuit for providing selection to one of the air supply connections. The circuit includes a first inversion valve with supply from a selector valve and control from a parking brake valve, a second inversion valve with supply from the parking brake valve and delivery to a first air supply connection, a synchro valve with supply from the parking brake valve and delivery to a second air supply connection, a double check valve with supply from the first inversion valve and the synchro valve and delivery to a control line of the second inversion valve and the synchro valve, a first trailer supply connection to the delivery line of the second inversion valve, and a second trailer supply connection to the delivery line of the synchro valve.

US Patent:

20060017317, Jan 26, 2006

Filed:

Jul 22, 2004

Appl. No.:

10/896493

Inventors:

David Howell - Emmaus PA, US
Jeffrey Krause - Wellington OH, US

International Classification:

B60T 13/00

US Classification:

303007000, 303009620, 303009660, 303127000, 303140000

Abstract:

A vehicle has a primary braking system and a secondary braking system. The vehicle has a dual brake valve with a primary circuit for pressurizing the primary system in response to application of force to a brake pedal, and a secondary circuit for pressurizing the secondary system in response to application of the primary circuit or force to a brake pedal. The vehicle also has an actuator for actuating the secondary circuit of the dual brake valve independently of the primary circuit, to provide for advanced braking functions such as roll stability and yaw stability. The actuator may be pneumatic or electric. The actuator can be energized by a vehicle electronic control unit in response to receiving a sensor output indicative of a vehicle condition.

US Patent:

20070029873, Feb 8, 2007

Filed:

Aug 1, 2005

Appl. No.:

11/194200

Inventors:

David Howell - Emmaus PA, US

Assignee:

Bendix Commercial Vehicle Systems LLC - Elyria OH

International Classification:

B60T 8/44

US Classification:

303114300, 303197000, 303003000

Abstract:

A brake system that uses a quick release valve in place of a double check valve to optimize the timing of the release of pressurized air from the brake chambers and supply lines is provided. The quick-release valve further includes a threaded exhaust port that functions as a second supply port. By using the threaded exhaust port as a second supply port, the diaphragm in the quick release valve acts similar to an unbiased diaphragm double check valve during periods of increasing air pressure, but retains the functionality of a quick release valve during periods of decreasing air pressure by favoring release through the threaded exhaust port.

US Patent:

20200018154, Jan 16, 2020

Filed:

May 24, 2019

Appl. No.:

16/421994

Inventors:

Brent D. Wheelock - Morristown NJ, US
Mehmet Deniz Ertas - Bethlehem PA, US
Joseph W. Witt - The Woodlands TX, US
David A. Howell - Houston TX, US

International Classification:

E21B 47/10
E21B 43/14
E21B 49/08
G01V 3/08

Abstract:

Hydrocarbon wells and methods for identifying production from a region of a subterranean formation. The hydrocarbon wells include a wellbore extending within the region of the subterranean formation and a production tubular that defines a production conduit and extends at least partially within the wellbore. The hydrocarbon wells also include an electromagnetic transmitter, an electromagnetic receiver, and a controller. The electromagnetic transmitter is configured to provide an input electromagnetic signal to a region of the production conduit to electromagnetically excite a produced tracer material that forms a portion of a produced stream that flows within the production tubular. The electromagnetic receiver is configured to receive an electromagnetic output signal from the region of the production conduit. The controller is programmed to identify the region of the subterranean formation based, at least in part, on the output electromagnetic signal. The methods include methods of operating the hydrocarbon wells.