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. 23, 1976
Filed:
Jul. 03, 1975
Applicant:
Inventor:
Erich Voldemar Kimber, Handen, SW;
Assignee:
Atlas Copco Aktiebolag, Nacka, SW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21C / ; E21C / ; E21C / ;
U.S. Cl.
CPC ...
248 16 ; 173 43 ; 248-2 ;
Abstract
A drill boom arrangement for positioning an elongated rock drilling apparatus to different drilling positions with respect to a support. The rock drilling apparatus is carried by a drill boom and the drill boom is mounted on a boom bracket. The boom bracket is slidable relative to the support in the latitudinal direction of the rock drilling apparatus. The boom bracket is moved along guiding means on the support means of a hydraulic cylinder. Means are provided for gearing up the piston stroke of the hydraulic cylinder.