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:
Sep. 15, 2015
Filed:
Mar. 22, 2011
Per Jonsson, Örebro, SE;
Per Jonsson, Örebro, SE;
Atlas Copco Rock Drills AB, Orebro, SE;
Abstract
The present invention relates to a hydraulic percussive arrangement comprising a displaceable arrangement () in a casing (), in which casing () the following are arranged at the displaceable arrangement (): a first chamber () connected to a return line () for hydraulic oil, a bushing () on a first side of the first chamber () and separated from the first chamber () by a first gap () along the displaceable arrangement (), and a second chamber () with a higher pressure of hydraulic oil than that of the first chamber () and arranged on a second side of the first chamber (), separated from the first chamber () by a second gap () along the displaceable arrangement (). According to the invention, a third chamber () is fixed arranged between the second gap () and the first chamber () and the third chamber () is connected to the first chamber () not only by a first passage () but also by a third gap () along the displaceable arrangement (). The invention relates also to a piston guide in such a hydraulic percussive arrangement and to a drilling rig with such a percussive arrangement.