Title:
MULTI-DIAMETER CORE DRILL
Document Type and Number:
WIPO Patent Application WO/2022/215815
Kind Code:
A1
Abstract:
The present invention relates to a multi-diameter core drill that can be used by mounting one or more core drill bits of various diameters to a single adapter, the multi-diameter core drill comprising: an adapter, which has a coupling unit at the upper side thereof and multiple core drill bit fixing guides of various diameters at the lower side thereof; and a core drill bit, which is mounted by the inner circumferential surface or outer circumferential surface thereof contacting the core drill bit fixing guides constituting the adapter, and provides a multi-diameter core drill which, by having the multiple core drill bit fixing guides of various diameters formed in the adapter to enable coupling with core drill bits of various diameters, obviates the need to have and switch to a different adapter whenever a hole of a different diameter is to be drilled and thus may reduce working time.
Inventors:
PARK RIN SOON (KR)
Application Number:
PCT/KR2021/013588
Publication Date:
October 13, 2022
Filing Date:
October 05, 2021
Export Citation:
Assignee:
PARK RIN SOON (KR)
International Classes:
B28D1/14; E21B10/02
Foreign References:
| JP2005199405A | 2005-07-28 | |||
| JP3805834B2 | 2006-08-09 | |||
| KR100558308B1 | 2006-03-10 | |||
| JPH07251311A | 1995-10-03 | |||
| CN207710959U | 2018-08-10 |
Attorney, Agent or Firm:
KANG, Hyeong Seok (KR)
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