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. 23, 2010
Filed:
Jan. 04, 2006
Erkki Ahola, Kangasala, FI;
Mauri Esko, Ikaalinen, FI;
Aimo Helin, Tampere, FI;
Markku Keskiniva, Ylöjärvi, FI;
Jorma Mäki, Mutala, FI;
Juha Piispanen, Tampere, FI;
Erkki Ahola, Kangasala, FI;
Mauri Esko, Ikaalinen, FI;
Aimo Helin, Tampere, FI;
Markku Keskiniva, Ylöjärvi, FI;
Jorma Mäki, Mutala, FI;
Juha Piispanen, Tampere, FI;
Sandvik Mining and Construction OY, Tampere, FI;
Abstract
The invention relates to a method for controlling a pressure fluid operated percussion device comprising a working chamber for pressure fluid and in the working chamber a transmission piston installed movably with respect thereto so as to enable a tool installed in the percussion device to be pressed against a material to be broken in order to generate a stress pulse, and to a percussion device. The method comprises adjusting the length of the stress pulse by adjusting the time during which pressure influences the transmission piston. The percussion device comprises an adjustment element and adjustment means for adjusting the influence time of the pressure of the pressure fluid being fed via a control valve and influencing the transmission piston.