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. 08, 1985
Filed:
Jun. 27, 1983
Sakae Sano, Tokyo, JP;
Hisashi Kitajima, Tokyo, JP;
Hiroshi Iimori, Yokohama, JP;
Tadashi Nishio, Koganei, JP;
Toa Grout Kogyo Co., Ltd., Tokyo, JP;
Mitsui Toatsu Chemicals, Inc., Tokyo, JP;
Tonan Kaihatsu Kogyo Co., Ltd., Tokyo, JP;
Abstract
A boring-injection device comprises a fluid supplying hollow rod, a fluid discharge portion at the lower end of the rod, and a packer element inflatable from the rod to seal a space between the rod and a borehole wall at a desired depth position. The rod is surrounded by a sheath so that the packer element and fluid discharge portion can be protruded out of and retracted within the sheath in a body. They are retracted during the boring operation and protruded during injecting or investigating operation. The device can be used for practising a method of ground improvement or a method of ground investigation.