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:
Feb. 13, 1990
Filed:
Nov. 30, 1988
Applicant:
Inventor:
Kouji Hoaki, Tokyo, JP;
Assignees:
Seisan Gijutsu Center Co., Ltd., Tokyo, JP;
NKS Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
E02D / ;
U.S. Cl.
CPC ...
405303 ; 83177 ; 5124 / ; 405232 ; 405229 ;
Abstract
A bucket is set to surround an upper end portion of an old pile, and an intermediate portion of the pile is radially cut by jetting high pressure water from the bucket from the center and opposite sides of the outer periphery of the old pile. The pile portion above the cut portion is chucked with a chuck mechanism, and in this state the chuck mechanism is turned to twistingly sever the pile portion above the cut portion with the stress thus produced, and the separated pile portion is removed. The above sequence of operations is repeatedly performed to remove the entire old pile.