Rotary press-in steel pipe pile
US10174475B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2015 |
| Grant date | Jan 8, 2019 |
| Priority date | — |
| Expiry date | Oct 21, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02D7/22
- WIPO fieldCivil engineering
- WIPO sectorOther fields
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.