David A Hobson

US Patent:

7951353, May 31, 2011

Filed:

Jun 7, 2010

Appl. No.:

12/794875

Inventors:

David Alan Hobson - Wheaton IL, US

Assignee:

Merichem Company - Houston TX

International Classification:

B01D 53/77
B01D 53/78
C01B 17/05

US Classification:

4235731, 4235766, 4235768, 422168, 422169, 422170

Abstract:

An apparatus and method of contacting a liquid with different gases sequentially in separate mass transfer zones within a single vessel, the mass transfer zones operatively in fluid communication with each other, including intimately contacting the liquid with a process gas in co-current flow in a downstream mass transfer zone to effect mass transfer between the liquid and the process gas, and introducing the liquid into an upstream mass transfer zone with a second gas, different from the process gas, thereby effecting mass transfer between the liquid and the second gas. The rate of flow of the liquid from the upstream mass transfer zone to downstream mass transfer zone is controlled by the controlled addition of a third gas into one or more downcomers separating each mass transfer zone such that the specific density of the liquid in the downcomers provides a driving force that controls flow.

US Patent:

20040216903, Nov 4, 2004

Filed:

Jan 13, 2004

Appl. No.:

10/756837

Inventors:

Paul Wierenga - Seattle WA, US
Cristy Kumasaka - Bothell WA, US
David Hobson - Edgewood WA, US
Alexander Mathers - Camano Island WA, US

International Classification:

A62C035/58

US Classification:

169/085000

Abstract:

A fire extinguisher includes a tank and a gas generator breech connected to the tank. The gas generator breech is provided with a hermetically sealed gas generator cartridge. The hermetically sealed gas generator cartridge avoids the need to have a release poppet or burst shims on the gas generator breech. The enclosed space that contains combustion gas pressure is provided by the gas generator cartridge itself and not the gas generator breech. The gas generator cartridge is made from a container that can be the precursor to a beverage can used for carbonated beverages. The beverage can may come in a thickness and material of construction that makes it a suitable, cost-effective container for the gas generator cartridge. However, other containers besides precursors of beverage cans can be used.

US Patent:

20050150665, Jul 14, 2005

Filed:

Oct 15, 2004

Appl. No.:

10/966954

Inventors:

Paul Wierenga - Seattle WA, US
Cristy Kumasaka - Bothell WA, US
David Hobson - Edgewood WA, US
Alexander Mathers - Camano Island WA, US

Assignee:

Aerojet-General Corporation - Redmond WA

International Classification:

A62C035/58

US Classification:

169085000

Abstract:

A fire extinguisher includes a tank and a gas generator breech connected to the tank. The gas generator breech is provided with a hermetically sealed gas generator cartridge. The hermetically sealed gas generator cartridge avoids the need to have a release poppet or burst shims on the gas generator breech. The enclosed space that contains combustion gas pressure is provided by the gas generator cartridge itself and not the gas generator breech. The gas generator cartridge is made from a container that can be the precursor to a beverage can used for carbonated beverages. The beverage can may come in a thickness and material of construction that makes it a suitable, cost-effective container for the gas generator cartridge. However, other containers besides precursors of beverage cans can be used.