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:
Nov. 11, 1986
Filed:
Dec. 20, 1984
Applicant:
Inventors:
Siegmund Babendererde, Bad Vilbel, DE;
Gunnar Lah, Erzhausen, DE;
Assignee:
Hochtief Aktiengesellschaft, Essen, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21D / ; E21D / ;
U.S. Cl.
CPC ...
405146 ; 405150 ;
Abstract
A movable wall delimiting a space into which concrete is pumped between a shield lining a tunnel wall and an inner form is advanced by the concrete pressure relative to the shield. This movable wall can be braced by adjustable spring force relative to the shield.