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:
Mar. 21, 2006
Filed:
Jan. 02, 2004
Applicants:
Markku Keskiniva, Tampere, FI;
Jorma Mäki, Mutala, FI;
Erkki Ahola, Kangasala, FI;
Esa Rantala, Kyrönlahti, FI;
Inventors:
Markku Keskiniva, Tampere, FI;
Jorma Mäki, Mutala, FI;
Erkki Ahola, Kangasala, FI;
Esa Rantala, Kyrönlahti, FI;
Assignee:
Sandvik Tamrock Oy, Tampere, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 1/28 (2006.01);
U.S. Cl.
CPC ...
Abstract
An impact device for a rock drill. The rock drill includes a tool and a mechanism for delivering a stress pulse to the tool. That mechanism includes an impact element supported to a frame of the drill, and a mechanism for subjecting the impact element to stress and thereafter releasing the impact element suddenly from the stress, whereupon stored stress energy in the impact element is discharged in the form of a stress pulse directed at the tool.