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Patent Searching and Data


Title:
EXCAVATION BIT
Document Type and Number:
WIPO Patent Application WO/2017/078311
Kind Code:
A1
Abstract:
The present invention relates to an excavation bit, and the excavation bit may comprise: a bit head part that has a pointed end excavation surface formed thereon, a plurality of stopper accommodating grooves having equal angles disposed on an outer circumference surface thereof, and a sliding shaft part formed in a rear end thereof; a wing bit that has a body that is formed long in a length direction, and shaft protrusions formed in both side surfaces thereof, wherein the shaft protrusions are inserted along guide grooves formed in the stopper accommodation grooves of the bit head part and installed to be foldable/unfoldable in the vicinity of the pointed end excavation surface of the bit head part; and an outer shell member that has a first stopper installed on one side thereof, being inserted deep into the stopper accommodation grooves and contacting the wing bit so that the wing bit can protrude outwardly from the bit head part while maintaining an unfolded state, and having a first length, and a second stopper installed on another side thereof, being inserted shallowly into the stopper accommodation grooves so as to form a space for the folded wing bit, and having a second length that is shorter than the first length.

Inventors:
KYE JIN TAE (KR)
Application Number:
PCT/KR2016/011952
Publication Date:
May 11, 2017
Filing Date:
October 24, 2016
Export Citation:
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Assignee:
C&P TECH CO LTD (KR)
DONGLIM IND CO LTD (KR)
International Classes:
E21B10/26; E02D3/12; E21B7/28; E21B10/32; E21B10/627
Foreign References:
KR20150110996A2015-10-05
KR20150110997A2015-10-05
KR101229209B12013-02-01
KR20140014419A2014-02-06
KR20090054192A2009-05-29
Attorney, Agent or Firm:
KIM, Nam Sik et al. (KR)
김남식 (KR)
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