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:
Jan. 08, 2019
Filed:
Oct. 21, 2015
Nippon Steel & Sumikin Engineering Co., Ltd., Tokyo, JP;
Kimihiro Nakazawa, Tokyo, JP;
Masatoshi Wada, Tokyo, JP;
Masamichi Sawaishi, Tokyo, JP;
Sakae Maruyama, Tokyo, JP;
Tomoyuki Shohji, Tokyo, JP;
Tomonori Yagishita, Tokyo, JP;
Takeshi Sawada, Tokyo, JP;
NIPPON STEEL & SUMIKIN METAL PRODUCTS CO., LTD., Tokyo, JP;
Abstract
This rotary press-in steel pipe pile includes: a steel pipe; a first blade which is formed in a substantially helical shape on the steel pipe so as to be positioned close to the distal end the steel pipe and in which a first sectorial gap having a central angle is formed in a circumferential direction thereof; and a second blade which is formed in a substantially helical shape on the steel pipe so as to be positioned close to the rear end of the steel pipe with respect to the first blade and in which a second sectorial gap having a central angle is formed in a circumferential direction thereof. The first sectorial gap of the first blade and the second sectorial gap of the second blade are disposed at positions that do not overlap in a circumferential direction, and the central angle of the second sectorial gap is set to be smaller than the central angle of the first sectorial gap.