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. 14, 2000
Filed:
Jan. 13, 1999
Applicant:
Inventor:
Frank Calandra, Jr, Pittsburgh, PA (US);
Assignee:
Jennmar Corporation, Pittsburgh, PA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21D / ; F16B / ;
U.S. Cl.
CPC ...
4053021 ; 405288 ; 411545 ; 411531 ;
Abstract
A double ribbed bearing plate for use with a channel member in supporting a mine roof. The bearing plate includes a base with ribs in the bearing plate define recesses which receive flanges on the channel. The longitudinal edges of the bearing plate may extend below the plane of the base. When installed on a mine roof, the longitudinal edges may be spread apart upon changes in the load applied by the mine roof.