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:
Oct. 16, 2001
Filed:
Jul. 14, 1998
Takeo Nasu, Tokyo, JP;
Kazuhiro Watanabe, Saitama Prefecture, JP;
Abstract
When an improving material used for ground improving construction is ejected into the ground, an improving material having a predetermined gel time is ejected through a vast number of points simultaneously or selectively from ejection ports provided in improving material transport passages such that the positions of the ejection ports are offset. The improving material can be ejected through the vast number of points as designed. A stroke, start and stop of an advancing and retreating movement adjusting device can be adjusted through a screw of the advancing and retreating movement adjusting device. A slide guide as a supporting mechanism is fitted to a slide bar so that even if a load deviated with respect to a piston rod is applied. The piston can be advanced and retreated smoothly, and an automatic on-off valve is interposed in the piston so that the improving material can be intaken and discharged smoothly. Since the improving material can be charged from the ejection ports through a vast number of points, it is possible to form a ground improved area having the same properties without deviation. The construction can be carried out as designed, the construction efficiency and accuracy can be enhanced, the cost is reduced, a resource can be saved, and the pollution can be prevented.