Title:
EXCAVATING APPARATUS FOR INTERNAL EXCAVATION OF CIRCULAR PIPES
Document Type and Number:
WIPO Patent Application WO/2021/085915
Kind Code:
A1
Abstract:
The present invention relates to an excavating apparatus for the internal excavation of circular pipes. An excavating apparatus for the internal excavation of circular pipes according to the present invention comprises: an excavation shaft which is inserted into a circular pipe inserted in the ground, and rotates; and at least one expansion wing which is rotatably connected to one side of the excavation shaft and spreads out due to friction with the ground as the excavation shaft rotates.
Inventors:
KIM KYU SANG (KR)
Application Number:
PCT/KR2020/014301
Publication Date:
May 06, 2021
Filing Date:
October 20, 2020
Export Citation:
Assignee:
KIM KYU SANG (KR)
International Classes:
E21B10/32; E02D7/30
Foreign References:
| JPH08338020A | 1996-12-24 | |||
| KR20140138397A | 2014-12-04 | |||
| US4031972A | 1977-06-28 | |||
| KR101080346B1 | 2011-11-07 | |||
| KR102132070B1 | 2020-07-08 |
Attorney, Agent or Firm:
HONG, Jung Wan (KR)
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