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:
Sep. 03, 2013
Filed:
May. 20, 2009
Minoru Yoshimoto, Sakura, JP;
Yasuhide Higo, Sakura, JP;
Eichi Manabe, Sakura, JP;
Wataru Kataoka, Hirakata, JP;
Kazuya Kuriyama, Hirakata, JP;
Minoru Yoshimoto, Sakura, JP;
Yasuhide Higo, Sakura, JP;
Eichi Manabe, Sakura, JP;
Wataru Kataoka, Hirakata, JP;
Kazuya Kuriyama, Hirakata, JP;
Komatsu Ltd., Tokyo, JP;
Abstract
Disclosed is a counterweight which is filled with a heavy-weight concrete containing, instead of currently used iron ores, a heavy-weight aggregate that scarcely causes the material segregation from cement paste and which can be produced at a low cost and is effectively enhanced in the filling factor of heavy-weight concrete into a case. A counterweightcomprises a caseand heavy-weight concrete filled therein, wherein the heavy-weight concrete contains a heavy-weight fine aggregate containing 20 mass % or more of aggregate particles having particle diameters of less than 0.15 mm and 20 mass % or more of aggregate particles having particle diameters of 2.5 mm to less than 5 mm.