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. 03, 1998
Filed:
May. 23, 1996
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, MN (US);
Robert Nestor, Albright, WV (US);
Assignee:
Jenmar Corporation, Pittsburgh, PA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21D / ;
U.S. Cl.
CPC ...
4053022 ; 4052591 ;
Abstract
A plurality of designs for mine roof bolts is disclosed. Each mine roof bolt includes a flexible multi-strand cable having a first and second end with a drivehead formed on the first end, the drivehead having a plurality of driving faces on an exterior surface thereof. The drivehead is a separate member. A barrel and wedge assembly is attached to the cable wherein the drivehead is utilized substantially for rotating the cable.