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:
Apr. 10, 2018
Filed:
Nov. 22, 2013
Atlas Copco Rock Drills Ab, Orebro, SE;
Erik Jakobsson, Orebro, SE;
Thomas Johansson, Orebro, SE;
Atlas Copco Rock Drills AB, Orebro, SE;
Abstract
A device in a hydraulic rock drilling machine () has a distribution valve (″) for controlling hydraulic flow to different parts of the rock drilling machine. The distribution valve has a valve body (″) which moves to and from in an axial direction inside a valve chamber (). The valve chamber is limited in axial direction by two valve end walls (″). One of the valve end walls is movable in an axial direction against an abutment (″) to define an end position for the valve body, and a pressing device (″) is provided for pressing at least one of the valve end walls against the abutment. A rock drilling machine includes the device.