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. 09, 1986
Filed:
Nov. 26, 1984
Applicant:
Inventor:
Volker Hentschel, Dorsten, DE;
Assignee:
Hochtief Aktiengesellschaft Vorm. Gebr. Helfmann, Essen, DE;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21D / ;
U.S. Cl.
CPC ...
405146 ; 405150 ; 405141 ; 299 31 ; 299 33 ;
Abstract
A tunneling machine of the type having a leading shield, a trailing shield, an annular form connected to the trailing shield by respective cylinder units for the emplacement of the concrete behind the machine and cylinder units for relatively advancing the leading and trailing shields, is also equipped with a telescoping shield assembly with its own set of cylinder units so that the concrete emplacement can be decoupled from the advance of the cutting head on the leading shield.
Hentschel, Volker. (1986). Tunneling machine (U.S. Patent No. 4627765). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4627765
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile