Title:
HYDRAULIC ROTATING STRIKING DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/208922
Kind Code:
A1
Abstract:
The present invention relates to a hydraulic rotating striking device having a shock buffering device, which is configured to buffer a shock, formed to be able to reciprocate inside a body portion of the striking device. The hydraulic rotating striking device comprises, between the body portion and the outer peripheral surface of the shock device, a high-pressure chamber, a first low-pressure chamber, a second low-pressure chamber, a first pressure chamber, and a second pressure chamber, respectively. The shock buffering device is characterized by comprising: an annular collar portion formed at the center of an outer diameter portion; an upper diameter portion formed on the upper side of the collar portion, the upper end surface of the upper diameter portion facing the inner upper end of the body portion; a lower diameter portion formed on the lower side of the collar portion, the lower end surface of the lower diameter portion facing a striking surface of a shank; and a second bypass channel for establishing communication between the high-pressure chamber and the second pressure chamber, when the distance of movement is below a preset distance during a boring operation, and interrupting the communication between the high-pressure chamber and the second pressure chamber, when the distance of movement is equal to or above the preset distance.
Inventors:
KIM JIN-KOOK (KR)
Application Number:
PCT/KR2014/005334
Publication Date:
December 31, 2014
Filing Date:
June 18, 2014
Export Citation:
Assignee:
EVERDIGM CORP (KR)
International Classes:
E21B1/26; E21B1/36
Foreign References:
JP2001341083A | 2001-12-11 | |||
KR20100039036A | 2010-04-15 | |||
KR20040091661A | 2004-10-28 | |||
KR20090006657A | 2009-01-15 |
Attorney, Agent or Firm:
SINJI PATENT FIRM (KR)
특허법인 신지 (KR)
특허법인 신지 (KR)
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