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:
Jan. 26, 1982
Filed:
Jul. 17, 1980
Applicant:
Inventors:
Chuen-Cheng Fu, North Brunswick, NJ (US);
Satya P Arya, Somerville, NJ (US);
Assignee:
Ingersoll-Rand Co., Woodcliff Lake, NJ (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21D / ; E21D / ;
U.S. Cl.
CPC ...
405259 ; 411 60 ;
Abstract
Broadly, the invention comprises defining a friction rock stabilizer with a configuration which will allow its insertion into an earth structure bore with minimal thrust force, and then deforming the inserted stabilizer, for instance, by forcing an insert thereinto to cause radial expansion of the stabilizer to increase its frictional engagement with the bore surface and produce a high anchorage thereof. The stabilizer set of the invention comprises a stabilizer and at least one oversized expansion insert therefore.