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:
May. 29, 1984
Filed:
Jul. 15, 1982
Gunter Flocke, Lunen, DE;
Hans Jutte, Dortmund-Brechten, DE;
Klaus Linde, Lunen, DE;
Winfried Klamke, Lunen, DE;
Werner Hampel, Selm, DE;
Gewerkschaft Eisenhutte Westfalia, Lunen, DE;
Abstract
Apparatus for, and a method of, driving a tunnel utilizes a drive shield to support the forward end of the tunnel where debris material is removed. At the rear end of the drive shield, a lining is created to cover the exposed tunnel wall. This lining is produced by simply spraying concrete rearwardly directly between the space between multi-part formwork and the tunnel wall itself. The formwork may overlap with the drive shield. The formwork is advanced to follow the progress of the drive shield by removing part of the formwork from the rear and re-siting this part at the front end.