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, 2012
Filed:
Jul. 06, 2004
Markku Keskiniva, Tampere, FI;
Jorma Mäki, Mutala, FI;
Mauri Esko, Ikaalinen, FI;
Erkki Ahola, Kangasala, FI;
Aimo Helin, Tampere, FI;
Timo Muuttonen, Siuro, FI;
Markku Keskiniva, Tampere, FI;
Jorma Mäki, Mutala, FI;
Mauri Esko, Ikaalinen, FI;
Erkki Ahola, Kangasala, FI;
Aimo Helin, Tampere, FI;
Timo Muuttonen, Siuro, FI;
Sandvik Mining and Construction Oy, Tampere, FI;
Abstract
A pressure fluid operated impact device comprising a frame () whereto a tool () is mountable movably in its longitudinal direction, and control means () for controlling pressure fluid feed to the impact device (), as well as a method of generating a stress pulse in a pressure fluid operated impact device. The impact device () comprises a working chamber () and a transmission piston () moving therein. Energy charging means for charging energy of pressure fluid and the control means are coupled to allow periodically alternately pressure fluid to flow to the working chamber () and, correspondingly, to discharge pressure fluid from the working chamber (). In the method, pressure fluid is fed to the working chamber (), which produces a force pushing the transmission piston () in the direction of the tool (), thus generating a stress pulse in the tool ().