Zhangjing G Chen from Christiansburg, VA, age 61

Name / Title

Company / Classification

Phones & Addresses

Zhangjing Chen

Phytosanitation Vacuum Systems, LLC
Wood Preserving

1650 Research Ctr Dr, Blacksburg, VA 24060

Zhangjing Chen
Incorporator

CHEN INC

P.o Bx 7205, Bluefield, WV 24701

Killing Insect Pests Inside Wood By Vacuum Dehydration
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US Patent:

7739829, Jun 22, 2010
Filed:

Jul 11, 2005
Appl. No.:

11/574551
Inventors:

Zhangjing Chen - Blacksburg VA, US
Marshall S. White - Blacksburg VA, US
William H. Robinson - Christiansburg VA, US
Assignee:

Virginia Tech Intellectual Properties, Inc. - Blacksburg VA
International Classification:

A01M 1/20
F26B 5/04
F26B 3/20
US Classification:

431321, 43124, 34 92, 34299, 422 33
Abstract:

Insect pests can be transported around the world in wooden shipping containers. To prevent the spread of wood-borne insect pests, it is necessary to kill insects within the wood. The wood is placed in a vacuum container having a flexible wall. The flexible wall presses against the wood and enables the wood to be heated by conduction. The wood and flexible wall can to be heated by contact with ambient or heated air, for example. Desiccant or dry air can be used to increase the rate of dehydration. Insects in the wood are typically killed after losing 25-50% of their body weight by dehydration. This technique will kill beetle larvae, nematodes and other invasive and destructive insects that live inside solid wood, and is particularly applicable for rendering wood acceptable for use in pallets and other containers shipped internationally.

Method And Apparatus For Vacuum Drying Wood In A Collapsible Container In A Heated Bath
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US Patent:

20030005597, Jan 9, 2003
Filed:

Jun 28, 2002
Appl. No.:

10/184073
Inventors:

Zhangjing Chen - Blacksburg VA, US
Fred Lamb - Christiansburg VA, US
International Classification:

F26B005/04
US Classification:

034/406000, 034/411000, 034/412000, 034/092000
Abstract:

Wood is disposed in a container having at least one flexible wall, and vacuum is applied to the container. The flexible wall presses against a surface of the wood. The container and wood are them immersed in a heated bath (e.g. comprising water, air, or other fluids). The wood is heated by conduction through the flexible wall, and maintained at accurate temperature by the bath. The wood is thereby rapidly dried by heat and vacuum. The present invention is energy efficient, and provides rapid, uniform drying of the wood without checking.

Zhangjing G Chen