The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 15, 1992
Filed:
May. 06, 1991
Bruno Bernhardt, Reutlingen, DE;
IEG Industrie Engineering GmbH, Betzingen, DE;
Abstract
An arrangement for treating a gas from a contaminated ground region in situ has a shaft wall which is at least partially gas-permeable and forms a shaft in a gas-tightly closed ground region. The shaft wall has a gas-impermeable shaft portion spaced from a shaft opening and two gas-permeable wall portions which surround the gas-impermeable wall portion. Gas transporting means produces a gas circulating flow in the shaft and in the ground region. At least one device for influences the intensity of the gas flow in the shaft in dependence on the density of the ground region for producing and maintaining a laminar gas flow in the ground region. At least one element provided in the region of the gas-permeable wall operates for changing a composition of the gas flow.