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:
Jul. 08, 2014
Filed:
Mar. 20, 2006
Applicants:
Kenneth Weddfelt, Stora Mellösa, SE;
Göran Tuomas, Örebro, SE;
Risto Wisakanto, Fagersta, SE;
Inventors:
Assignee:
Atlas Copco Rock Drills AB, Orebro, SE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B25D 17/02 (2006.01); E21B 28/00 (2006.01); B25D 9/12 (2006.01);
U.S. Cl.
CPC ...
E21B 28/00 (2013.01); B25D 9/125 (2013.01);
Abstract
An impulse generator () for a percussive tool includes a chamber () for receiving a liquid volume and an impulse piston () which is arranged for transferring pressure pulses in the liquid volume into stress wave pulses in the tool. The chamber () is adapted with respect to its shape such that it forms a resonance chamber for liquid in the liquid volume for forming at least one pressure antinode () inside the chamber. The invention also concerns a method and a hydraulic impulse tool.