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. 09, 1999
Filed:
Jun. 08, 1998
Applicant:
Inventors:
Frederick Morello, Johnstown, PA (US);
David B Berkey, Johnstown, PA (US);
Assignee:
M. I. C. Industries, Inc., Reston, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21D / ; E04D / ;
U.S. Cl.
CPC ...
405151 ; 52528 ; 52539 ; 405124 ; 4051501 ;
Abstract
Tunnel liners are formed from panels of arched sheet material. The panels include a central portion, inclined side portions and wing portions. One of the wing portions has a hook portion and the other of the wing portions has a receptacle portion. The hook portions and receptacle portions are constructed so as to snap-fit with respective receptacle portions and hook portions of adjacent panels. Panels can thus be more easily be assembled together. Panels can also be continuously seamed together from the underside, i.e., from within an arched assembly of panels.