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:
Jan. 03, 1978
Filed:
Mar. 31, 1977
Applicant:
Inventor:
Klaus Spies, Dortmund-Persebeck, DT;
Assignee:
Bochumer Eisenhutte Heintzmann GmbH & Co., Bochum, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21D / ;
U.S. Cl.
CPC ...
61 4 / ;
Abstract
A mine roof support for an underground mine gallery includes a sole plate resting on the floor of the mine gallery, a roof shield pressed against the roof of the mine gallery by a plurality of hydraulically operated props, and means for maintaining the position of the props relative to the sole plate and the roof shield.