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. 06, 1977
Filed:
Jul. 20, 1976
Applicant:
Inventor:
Henri Chave, Bourg en Bresse, FR;
Assignee:
Ugine Aciers, Paris, FR;
Primary Examiner:
Int. Cl.
CPC ...
F16B / ;
U.S. Cl.
CPC ...
403359 ; 89 16 ;
Abstract
A composite extension rod for coupling a drilling tool and a hammer which is located outside of the drill hole and has a central tube surrounded by parallel high strength rods and an outer sheath which has coupling sleeves at its ends.