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. 22, 2011
Filed:
Mar. 22, 2006
Applicants:
Markku Keskiniva, Ylöjärvi, FI;
Jorma Mäki, Mutala, FI;
Mauri Esko, Ikaalinen, FI;
Erkki Ahola, Kangasala, FI;
Inventors:
Markku Keskiniva, Ylöjärvi, FI;
Jorma Mäki, Mutala, FI;
Mauri Esko, Ikaalinen, FI;
Erkki Ahola, Kangasala, FI;
Assignee:
Sandvik Mining and Construction Oy, Tampere, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for controlling the operation of a pressure fluid operated percussion device and to a pressure fluid operated percussion device. The method includes influencing the shape of a stress wave by setting a suitable clearance between a transmission piston and a tool. The percussion device is provided with a device for setting the clearance between the transmission piston and the tool.