公开(公告)号：US12065928B2

公开(公告)日：2024-08-20

申请号：US17144686

申请日：2021-01-08

Applicant: SANDVIK INTELLECTUAL PROPERTY AB

Inventor： Reinhold Pogatschnigg ,  Christian Umundum

IPC: E21B7/02 ,  E21C35/24 ,  F15B13/08

CPC classification number: E21B7/022 ,  E21C35/24 ,  F15B13/0814 ,  F15B13/0825 ,  F15B13/0842 ,  F15B13/0878 ,  F15B13/0896

Abstract: A control unit for controlling machine functions of a mining machine, such as an underground mining machine, tunneling machine or bolting rig, includes a flameproof housing having at least one fluid inlet and at least one fluid outlet, and a plurality of fluid control valves respectively communicating with the at least one inlet and outlet. In particular, the fluid control valves are formed inside at least one valve monoblock, the monoblock including a plurality of distinct fluid passages.

公开(公告)号：US11028862B2

公开(公告)日：2021-06-08

申请号：US16487083

申请日：2017-02-24

Applicant: SANDVIK INTELLECTUAL PROPERTY AB

Inventor： Reinhold Pogatschnigg ,  Christian Umundum

IPC: F15B11/00 ,  E02F9/22 ,  E21C27/38 ,  F15B13/06

Abstract: A hydraulic system arranged to control at least two hydraulic actuators via a metering control valve assembly. The hydraulic system is advantageous to control a pivoting arm of an undercutting mining machine according to at least two modes of operation including an idling mode and a cutting mode. In particular, the hydraulic actuators may be controlled by quantitative variation of fluid flow speed and pressure.