公开(公告)号：US20190186206A1

公开(公告)日：2019-06-20

申请号：US16222648

申请日：2018-12-17

Applicant: SANDVIK MINING AND CONSTRUCTION OY

Inventor： Kimmo ERONEN ,  Anssi HYVARINEN ,  Paul BROWN ,  Stephen CONNELLY ,  Risto KALLINEN ,  Sirpa LAUNIS ,  Juha PIIPPONEN ,  Esa RANTALA ,  Teemu MAJANDER

IPC: E21B15/00 ,  E21B7/02 ,  B32B1/08 ,  B32B27/08 ,  B32B27/06 ,  B32B27/40 ,  B32B5/18

CPC classification number: E21B15/00 ,  B32B1/08 ,  B32B5/18 ,  B32B27/065 ,  B32B27/08 ,  B32B27/40 ,  B32B2262/106 ,  B32B2266/0278 ,  B32B2307/56 ,  B32B2597/00 ,  E21B7/025

Abstract: A feed beam, a rock drilling unit and to a method of manufacturing a feed beam is provided. The feed beam includes a basic profile element, which has two or more superimposed material layers. At least one of the material layers may be made of a composite material.

公开(公告)号：US20170370150A1

公开(公告)日：2017-12-28

申请号：US15629074

申请日：2017-06-21

Applicant: SANDVIK MINING AND CONSTRUCTION OY

Inventor： Esa RANTALA ,  Timo MUUTTONEN ,  Ari KOTALA ,  Pekka SAUKKO

IPC: E21B7/02 ,  E21B1/02

CPC classification number: E21B7/022 ,  E21B1/02 ,  E21B7/025

Abstract: A rock drill includes a frame, a percussion member, an axial shank, and an axial sleeve provided within the frame and including a first pressure surface provided in a first pressure space and a second pressure surface provided in a second pressure space. A first channel is provided in the axial sleeve for providing a connection between the first pressure space and the second pressure space in at least one position of the axial sleeve in the frame. A second pressure channel connected to the second pressure space is connectable to external pressure. A iu pressure accumulator is connected to the first pressure space and the flow of the pressure medium outwards from the first pressure space is throttled.