Retractable auger head
US10519719B2 · kind B2 · utility
0Cited by
2References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 24, 2017 |
| Grant date | Dec 31, 2019 |
| Priority date | — |
| Expiry date | Jan 3, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D9/1093
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A retractable auger boring cutter head. The cutter head has fixed cutters and at least one pivoting cutter. The pivoting cutter is biased to a position that extends beyond a diameter of a casing being installed. When pulled back through the casing, a surface of the pivoting cutter contacts the casing, reducing the effective diameter of the cutter head and allowing it to be removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.