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:
Jan. 31, 1978
Filed:
Oct. 08, 1975
Ingvald O Juvrud, Poland, OH (US);
Commercial Shearing, Inc., Youngstown, OH (US);
Abstract
A tunnel liner and segment are provided for simplifying changes in direction. The segment comprises a pair of liner plates each having a curved elongated skin with spaced parallel dependent sidewalls bent at an angle thereto, said liner plates being in spaced side-by-side relationship, spaced apart a selected greater distance at one end than at the other end, a pair of wedge shaped gusset plates in spaced parallel planes fixed to the sidewalls between said liner plates adjacent the top and bottom respectively of the adjacent sidewalls and an end plate at each end of said pairs of liner plates extending the remote sidewalls of each segment and connected to the sidewalls, gusset plates and skins to form a unitary whole.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile