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:
May. 06, 1986
Filed:
Aug. 21, 1984
Applicant:
Inventors:
Pauli Rajakallio, Tampere, FI;
Pentti Hyvonen, Tampere, FI;
Assignee:
Oy Tampella AB, Tampere, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21C / ;
U.S. Cl.
CPC ...
173 43 ; 173 39 ; 173 20 ; 3318 / ;
Abstract
The present invention relates to a method and an apparatus for positioning a drilling apparatus with respect to a drilling plane formed by holes to be drilled in a rock in a tunnel. Light beams pointing in opposite directions are developed and fixed with respect to the drilling unit and are directed towards marks on the tunnel walls by adjusting the base of the apparatus in a horizontal plane.
Rajakallio, Pauli. (1986). Method of and arrangement for positioning of a drilling apparatus (U.S. Patent No. 4586571). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4586571
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