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. 01, 2025
Filed:
Sep. 20, 2022
Applicant:
Sandvik Mining and Construction Oy, Tampere, FI;
Inventors:
Juho Rantanen, Tampere, FI;
Pertti Parkkinen, Tampere, FI;
Samuli Verho, Tampere, FI;
Harri Vatanen, Tampere, FI;
Teemu Hongell, Tampere, FI;
Assignee:
Sandvik Mining and Construction Oy, Tampere, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 7/02 (2006.01); E21B 44/02 (2006.01);
U.S. Cl.
CPC ...
E21B 7/022 (2013.01); E21B 7/025 (2013.01); E21B 44/02 (2013.01);
Abstract
A hydraulic system, rock drilling rig, and method for limiting the output performance of a hydraulic drilling actuator temporarily under execution of a safety function feature of the hydraulic system. The output performance is limited by limiting produced hydraulic fluid flow in a hydraulic circuit of the hydraulic drilling actuator, whereby a restricted magnitude of the fluid flow is produced at a hydraulic pump. This way a restricted operation mode is enabled and is controlled by a control unit.