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. 21, 2015
Filed:
Aug. 25, 2008
Naoki Ono, Osaka, JP;
Hiroaki Sakamoto, Osaka, JP;
Kazuhiro Hirao, Osaka, JP;
Toshinobu Kakita, Osaka, JP;
Yasushi Wada, Osaka, JP;
Yoshihito Fujii, Tokyo, JP;
Tsuneo Onodera, Miyagi, JP;
Naoki Ono, Osaka, JP;
Hiroaki Sakamoto, Osaka, JP;
Kazuhiro Hirao, Osaka, JP;
Toshinobu Kakita, Osaka, JP;
Yasushi Wada, Osaka, JP;
Yoshihito Fujii, Tokyo, JP;
Tsuneo Onodera, Miyagi, JP;
Kubota-C.I. Co., Ltd., Sakai-shi, JP;
Paddy Research Co., Ltd., Tome-shi, JP;
Abstract
A subirrigation systemincludes a water-impervious member, and keeps water content in soil of a cultivated landin a proper state for growing a plant. The water-impervious memberis formed into an upper opening vessel shape, and has a water reserving function. Water is fed to an inner portion of the water-impervious memberfrom a water tankvia a feed water pipe, whereby a soil portionin a gravitational water state is formed. A water levelof the gravitational water within the water-impervious memberis properly controlled to a desired water level by a water level controllerprovided in the feed water pipe. The gravitational water within the water-impervious membercontrolled to the desired water level is appropriately sucked up to the soil in an upper layer in accordance with a capillary phenomenon. Accordingly, a soil portionin a capillary water state having proper water content is formed in the cultivated land