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.

Date of Patent:
Jun. 11, 2024

Filed:

Mar. 16, 2020
Applicant:

Sandvik Mining and Construction Oy, Tampere, FI;

Inventors:

Antti Koskimaki, Tampere, FI;

Mikko Hamalainen, Tampere, FI;

Matti Viinikka, Tampere, FI;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B25D 17/28 (2006.01); B25D 9/14 (2006.01); E21B 4/14 (2006.01);
U.S. Cl.
CPC ...
B25D 17/28 (2013.01); B25D 9/145 (2013.01); E21B 4/14 (2013.01); B25D 2250/051 (2013.01);
Abstract

A rock drilling arrangement includes an impact device having a frame, pressure chambers in the frame, and a piston arranged in the impact device. The arrangement further includes a rear mounting arrangement for attaching the impact device to a carriage, a front mounting arrangement for attaching the impact device to a machine component, at least one fore pressure accumulator arranged on a front side of the rear mounting arrangement in an axial direction of the piston, and at least one rear pressure accumulator arranged on a back side of the rear mounting arrangement. The fore pressure accumulator and the rear pressure accumulator are connected to one of the pressure chambers and arranged to absorb pressure fluctuations in the pressure chambers.


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