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:
Mar. 20, 1990
Filed:
May. 19, 1988
Shozo Konno, Tokyo, JP;
Nobuyuki Matsui, Tokyo, JP;
Kajima Corporation, Tokyo, JP;
Abstract
An underground continuous water-impervious wall is disclosed, which includes a water-impervious membrane to partition a trench and to prevent water from passing through the wall. The trench as formed in the ground has a narrow width. The impervious sheet is lowered into the trench to partition the trench longitudinally. A hardening material is charged against the opposite side surfaces of the impervious sheet in the trench and solidified, whereby a water-impervious wall is obtained, with the impervious sheet sandwiched between opposite side wall portions. The impervious sheet is disposed in the trench by lowering the sheet in the form of a roll, lowering the sheet pre-stretched between posts, or lowering a pleated sheet pre-packed in a sheet cartridge. Adjacent sheets are connected to each other by female and male fasteners.