Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
CORE DRILL
Document Type and Number:
WIPO Patent Application WO/2020/111583
Kind Code:
A1
Abstract:
The present invention relates to a core drill and, more specifically, to a core drill, wherein: a bit forward movement bolt for moving a core bit for forming a perforation at a perforation point can be rotated and moved along a central rod by a worker using a tool, to allow a perforation operation to be performed even in a narrow or uneven operation place, so that the core drill has no limitation in the operation space and improves the operation efficiency; the central rod, the core bit, the bit forward movement bolt, and a fixing bolt of the core drill can be separated into individual units, so that the separated individual units can be assembled, only when being used, to actively perform a perforation operation and, after the operation is finished, can be separated from each other to reduce the occupied volume and be then put into a separate portable case, and thus the storability and portability of the core drill are very convenient; and the core drill includes a foreign material cover part installed at the end of the central rod, so that foreign materials such as dirt and dust generated during the perforation of the core bit are blocked by the foreign material cover part and are prevented from settling on a screw thread of the central rod, and accordingly the bit forward movement bolt can actively move along the central rod to enable efficient perforation.

Inventors:
GWAK BYEONG GWAN (KR)
Application Number:
PCT/KR2019/015357
Publication Date:
June 04, 2020
Filing Date:
November 13, 2019
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
GWAK BYEONG GWAN (KR)
International Classes:
B28D1/14
Foreign References:
KR101858106B12018-05-15
US6152661A2000-11-28
US5393175A1995-02-28
US20140369774A12014-12-18
JPH09262820A1997-10-07
Attorney, Agent or Firm:
CHOI, Kyu Whan (KR)
Download PDF: