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:
Mar. 16, 1993
Filed:
Aug. 23, 1991
Applicant:
Inventor:
Lawrence E Long, Avon Lake, OH (US);
Assignee:
Dyckerhoff & Widmann AG, Munich, DE;
Primary Examiner:
Int. Cl.
CPC ...
E21D / ;
U.S. Cl.
CPC ...
4052591 ; 405288 ;
Abstract
A roof support system is disclosed having a first rod extending into a first bore in the roof of a mine, a second rod extending into a second bore into the roof of a mine, a connector having a first hole through which the free end of the first rod is inserted and a second hole through which the free end of the second rod is inserted such that the first rod is held in securing fashion within the connector, and a nut threadably engaged to the second rod at an end of the second rod which exits the second hole of the connector, the connector and the rods forming a roof support system.