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.
Patent No.:
Date of Patent:
Apr. 12, 1983
Filed:
Jun. 29, 1981
Applicant:
Inventor:
Siegmar Block, Essen, DE;
Assignee:
Thyssen Industrie AG, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21D / ;
U.S. Cl.
CPC ...
405302 ; 9117 / ;
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.