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:
Apr. 10, 1979
Filed:
Dec. 12, 1977
Applicant:
Inventors:
Dieter Stuckmann, Selm, DE;
Hans Jutte, Dortmund-Brechten, DE;
Assignee:
Gewerkschaft Eisenhutte Westfalia, Lunen, DE;
Primary Examiner:
Int. Cl.
CPC ...
E01G / ;
U.S. Cl.
CPC ...
405141 ;
Abstract
Shield apparatus for tunnelling comprises a framework supporting drive members advanced individually or in groups as known per se. The framework and its drive members are carried by a pair of elongate floor beams arranged at the sides of the tunnel wall. Each floor beam has a longitudinal slot or groove therein which is open to the rear end of the beam. This slot or groove receives anchoring pins fitted in situ into the floor of the tunnel working so that the beams can slide along the pins in the direction of advancement.