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Class Information
Number: 405/302
Name: Hydraulic and earth engineering > Earth treatment or control > Shoring, bracing, or cave-in prevention > Roof support > Jack > Mobile > Control system
Description: Method or apparatus for supply of motive energy to the prop via a regulating circuit to actuate the prop.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8672414 Method for controlling longwall mining operations Mar. 18, 2014
8567869 Shield control device for carrying out the longwall function of a longwall unit in the longwall face working in a mine Oct. 29, 2013
7775748 Shield support Aug. 17, 2010
7740421 Arrangement for the admission of pressurized water to spray systems Jun. 22, 2010
7704018 Automated, low profile drilling/bolting module with automated stab jack Apr. 27, 2010
7455368 Control mechanism for the extension units in the longwall face of a mine Nov. 25, 2008
7455367 Longwall support control for controlling the movements of longwall support units in the longwall of a mine Nov. 25, 2008
7428861 Valve for hydraulic props of shield-type support frames, and shield-type support frame Sep. 30, 2008
7416369 Timbering and walling control for controlling the movements of timbering and walling units in the coal face of a mine Aug. 26, 2008
7237983 Hydraulic shield support Jul. 3, 2007
7177709 Controller for underground mining Feb. 13, 2007
6945738 Method and apparatus for safety protection of temporary roof support Sep. 20, 2005
6942301 Method for boring and placing bolts for imbedding adhesively and device for carrying out this method Sep. 13, 2005
6857705 Mining machine and method Feb. 22, 2005
6361119 Mining control system for adjusting the advance of mining tools Mar. 26, 2002
6257962 Apparatus and methods for forming hollow-ground knife blades Jul. 10, 2001
6248705 Stable perfumed bleaching compositions Jun. 19, 2001
5741092 Cable bolt driver Apr. 21, 1998
5454669 Yield valve Oct. 3, 1995
5423638 Mine roof supports Jun. 13, 1995
5401123 Control device for mine-roof support Mar. 28, 1995
5362133 Method of mining coal seams at a defined preset depth of cutting during ploughing with a cutter Nov. 8, 1994
5275469 Method of working coal seams to a defined preset depth of cutting during ploughing with a cutter Jan. 4, 1994
5234256 Cutting apparatus for mining operations with automatic control Aug. 10, 1993
5222838 Power mine door system Jun. 29, 1993
5137336 Process for the automated winning of mineral, such as coal, in a longwall working Aug. 11, 1992
5135264 Flow coupling with frangible pressure sensitive holding member to allow venting Aug. 4, 1992
5110187 Apparatus for the mining of mineral matter, especially coal May. 5, 1992
5073067 Mine roof support Dec. 17, 1991
5062033 Electro-hydraulic control system for a mineral mining installation Oct. 29, 1991
5060556 Arrangement for emergency operation of hydraulic appliance in an electro-hydraulically controlled mineral mining installation Oct. 29, 1991
5029943 Apparatus for transmitting data Jul. 9, 1991
5026218 Temporary roof support cylinder Jun. 25, 1991
5017051 Electrohydraulic control means for hydraulic self-advancing support units May. 21, 1991
5000622 Shaking control unit for a hydraulic cylinder Mar. 19, 1991
4964675 Method of electro-hydraulic control of longwall mine units Oct. 23, 1990
4957327 Methods of translating a face support Sep. 18, 1990
4946316 Method and device for moving a shield-type support trestle Aug. 7, 1990
4936714 Valve devices for use with mining equipment Jun. 26, 1990
4913499 Equipment and method for measuring convergence Apr. 3, 1990
4907918 Shaking control unit for a hydraulic cylinder Mar. 13, 1990
4906143 Electro-hydraulic control systems Mar. 6, 1990
4906133 Mining apparatus for utilization in recovering coal Mar. 6, 1990
4900091 Electrohydraulic coal-mining system Feb. 13, 1990
4899332 Data transmission/reception systems for electro-hydraulic control systems Feb. 6, 1990
4892446 Group control means for hydraulic mine-roof supports Jan. 9, 1990
4887935 Method of controlling the movement of a longwall excavation front, especially the face or breast of a coal seam Dec. 19, 1989
4798417 Method of separating the upper coal in seams Jan. 17, 1989
4755084 Multi-part roof-contacting structures of mine roof supports Jul. 5, 1988
4737052 Distributor Apr. 12, 1988

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