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:
Jun. 24, 1980
Filed:
Aug. 30, 1978
Applicant:
Inventor:
Wolf Magnus, Norderstedt, DE;
Assignee:
Hochtief AG Vorm. Gebr. Helfmann, Essen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
106 99 ;
Abstract
A tunnel lining is formed by pumping concrete between a support and a tunnel wall, the concrete being selected from the concretes of concrete group BII of German Industrial Standard (DIN) 1045 and containing as an additive, steel pins, rods or wires having a length of 35 to 50 mm and a diameter of 0.8 to 1.2 mm. Approximately 100 kg/m.sup.3 of concrete is constituted by the steel pins or wires.