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Title:
HYDRAULIC IMPACT DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/222210
Kind Code:
A1
Abstract:
The present invention relates to a hydraulic impact device and, more particularly, to a hydraulic impact device capable of automatically switching an impact stroke in accordance with a state of bed rock in the ground and, when the impact stroke is performed, preventing a no-load impact to prevent breakage of a piston and a load chamber.

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Inventors:
KANG YOUNG KY (KR)
CHO JAE SANG (KR)
Application Number:
PCT/KR2017/005856
Publication Date:
December 28, 2017
Filing Date:
June 05, 2017
Export Citation:
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Assignee:
SOOSAN HEAVY IND CO LTD (KR)
International Classes:
E02F3/96; B25D9/04; B25D9/16; E02F5/30
Foreign References:
KR20090041823A2009-04-29
KR20110006038A2011-01-20
KR101506603B12015-03-27
KR101550899B12015-09-08
KR100422093B12004-03-10
Attorney, Agent or Firm:
CHOI, Kwang Seok (KR)
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