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. 11, 1980
Filed:
Apr. 10, 1979
Applicant:
Inventors:
Erich V Kimber, Handen, SE;
Nils Hokby, Enskede, SE;
Assignee:
Atlas Copco Aktiebolag, Nacka, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16M / ;
U.S. Cl.
CPC ...
248654 ; 173 43 ;
Abstract
A hydraulic drill boom arrangement for drifting and tunnelling comprises a boom proper (10) that is universally pivotably carried by a support plate (13) and carries a feed beam (40) for a rock drill (41) at its outer end. Two hydraulic cylinders (16, 17) are coupled between the support plate and the boom and located on each side of the boom so that both cylinders are loaded by the weight of the boom, which makes the boom very stable in all positions.