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:
Apr. 09, 1991
Filed:
Dec. 05, 1989
Applicant:
Inventor:
Kosei Fukuda, Yokohama, JP;
Assignee:
Tenox Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E02D / ;
U.S. Cl.
CPC ...
405240 ; 405236 ; 405232 ; 405267 ;
Abstract
An excavation rod of a ground improvement apparatus is provided with an excavation blade and plural steps of agitation blades above the excavation blade. A corotation prevention blade which does not rotate during the excavation vertically and rotationally, is provided between the excavation blade and the agitation blade and plurality of downwardly projecting fingers are secured to the corotating prevention blade.