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:
Dec. 11, 1990
Filed:
Apr. 06, 1990
Applicant:
Inventors:
Dennis Z Mraz, Saskatoon, CA;
Anil Mahyera, Saskatoon, CA;
Assignee:
Engineered Instruments, Inc., Saskatoon, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21D / ;
U.S. Cl.
CPC ...
405261 ; 405260 ; 405259 ; 411 82 ;
Abstract
An anchor device for securing a rock bolt in a borehole of predetermined diameter includes an elongated plastic cartridge having a first insertable end and a second end, a side wall extending between the ends, and stiffening ribs integrally formed in the sidewall for stiffening the cartridge to permit insertion thereof into the borehole.