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. 16, 2021
Filed:
May. 31, 2018
Sandvik Intellectual Property Ab, Sandviken, SE;
Olivier Bruandet, Tampere, FI;
SANDVIK INTELLECTUAL PROPERTY AB, Sandviken, SE;
Abstract
A down the hole rock drilling machine and a method of drilling rock. The drilling machine comprises a casing () inside which is a control sleeve (). A reciprocating piston () is arranged to move inside the control sleeve and control feeding and discharging of working chambers (). Between the control sleeve and an inner surface of the casing are all the fluid passages () needed for fluid routing. The piston opens and closes transverse openings and controls the work cycle.
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