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Title: Control device for an advancing support in underground mining

Abstract: An improved control for an underground mining working support unit arrangement of the type having an adjacent support unit arrangement hydraulically connectable to the working support unit arrangement in which a plurality of hydraulic supports support load points, it is disclosed wherein the hydraulic supports are successively connectable to several of the load points with a reversing valve operable to alternately connect control valves to selected hydraulic supports.


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Inventors: Block, Siegmar (Essen, DE)

Application Number: 06/278075
Filing Date: 1981-06-29
Publication_date: 1983-04-12
Assignee: Thyssen, Industrie (DE)

Primary Class(es): 405/302 91/170MP
Other Classes: E21D23/16; E21D23/00; E21D23/18
US Patent Ref:
3453935July, 1969Rieschel405/299MINE ROOF SUPPORT SYSTEMS
3541926November, 1970Grebe405/302CONTROL SYSTEM FOR A STEPPING HYDRAULIC ROOF PROPPING SYSTEM
4327628May, 1982Weirich et al.405/302Hydraulic roof support control system

Other Refs: DE1277786
September, 1968405/302

Primary Examiner: Taylor, Dennis L.
Assistant Examiner:
Attorney: Mcglew, And Tuttle
Claims:
What is