Title:
CORE DRILL HAVING FUNCTION FOR ONE-TOUCH LOCKING CORE BIT
Document Type and Number:
WIPO Patent Application WO/2020/130423
Kind Code:
A1
Abstract:
The present invention relates to a core drill having a function for one-touch locking a core bit and, more particularly, to a new concept technology that automatically maintains locking and conveniently releases the locking when assembling a core bit and a reduction gear unit. A conventionally disclosed core drill does not have a separate locking function in the state in which a core bit and a reduction gear unit are assembled to each other, which causes a problem in which movement of the core bit or the reduction gear unit occurs or the core bit and the reduction gear unit are separated from each other during an operation. In order to solve this problem, the present invention provides a technology that allows locking to be automatically maintained when a reduction gear connector coupled to a core bit is inserted into a connection hole formed through a spindle in the state in which the locking is released by pressing a lock pin elastically installed in a lock housing fitted on the outside of the spindle and then the lock pin is released.
Inventors:
JEON BYUNG-WOO (KR)
JEON BYUNG-KWON (KR)
JEON BYUNG-KWON (KR)
Application Number:
PCT/KR2019/016924
Publication Date:
June 25, 2020
Filing Date:
December 03, 2019
Export Citation:
Assignee:
DAESUNG GT CO LTD (KR)
International Classes:
B28D1/14; E21B10/02
Foreign References:
| KR101858106B1 | 2018-05-15 | |||
| US20160067794A1 | 2016-03-10 | |||
| KR100542363B1 | 2006-01-10 | |||
| KR101653561B1 | 2016-09-05 | |||
| KR101990801B1 | 2019-06-19 | |||
| KR101858106B1 | 2018-05-15 |
Other References:
See also references of EP 3900905A4
Attorney, Agent or Firm:
SEO, Il Ho (KR)
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