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. 17, 1995
Filed:
Oct. 08, 1992
Davide Trevisani, Cesena, IT;
Trevi S.p.A., Cesena, IT;
Abstract
A tunnel excavation apparatus comprises a frame mounted on crawler tracks and provided with pistons comprising stabilizer feet, a power unit, a working unit, and auxiliary movement and positioning services. The working unit is arranged on an arm mounted on one end of telescopic uprights, which are hinged at their other ends to the frame about an axis substantially parallel to the longitudinal direction of the machine, and consists of a rectilinear rigid structure, at the perimeter of which excavation tools are arranged on a chain, to circulate along the side and front of the structure. The tools are hinged to a caisson open on the side opposite the hinged side and provided with apparatus for conveying concrete into its interior.