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:
Nov. 27, 2001
Filed:
Jan. 24, 2000
Applicant:
Inventors:
Frank Calandra, Jr., Pittsburgh, PA (US);
Eugene H. Stewart, Pittsburgh, PA (US);
Stanley Ponce, Cresson, PA (US);
John G. Oldsen, Butler, PA (US);
John C. Stankus, Canonsburg, PA (US);
Brian R. Castle, Rolla, MO (US);
Assignee:
Jennmar Corporation, Pittsburgh, PA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E02D 1/700 ; E21D 2/000 ;
U.S. Cl.
CPC ...
E02D 1/700 ; E21D 2/000 ;
Abstract
A mine roof bolt includes a flexible multi-strand cable having a first and second end with a drive head formed on the first head, the drive head having a plurality of driving faces on an exterior surface thereof. A load bearing barrel and wedge assembly is attached to the cable, with a separate drive head attached to the cable, wherein the separate drive head is utilized substantially for rotating the cable.