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:
Jun. 17, 2025
Filed:
Jun. 01, 2021
Applicant:
Sandvik Mining and Construction Oy, Tampere, FI;
Inventors:
Antti Koskimaki, Tampere, FI;
Lars Kandelin, Tampere, FI;
Mikko Hamalainen, Tampere, FI;
Timo Kela, Tampere, FI;
Matti Viinikka, Tampere, FI;
Esa Laakkola, Tampere, FI;
Assignee:
Sandvik Mining and Construction Oy, Tampere, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B25D 17/06 (2006.01); B25D 9/12 (2006.01); E21B 1/26 (2006.01);
U.S. Cl.
CPC ...
B25D 17/06 (2013.01); B25D 9/12 (2013.01); E21B 1/26 (2020.05); B25D 2217/0019 (2013.01); B25D 2250/125 (2013.01); B25D 2250/331 (2013.01);
Abstract
A piston guiding element, rock drilling machine and method for supporting a front end portion of a percussion piston of a rock drilling machine. The piston guiding element includes a braking recess at its rear end. The element further includes at least one bearing sleeve, which is provided with two axially successive slide bearing sections. Hydraulic fluid is conveyed between the slide bearing sections via a feed system.