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Title:
UNDERWATER HYDRAULIC BREAKER
Document Type and Number:
WIPO Patent Application WO/2019/083089
Kind Code:
A1
Abstract:
The present invention provides an underwater hydraulic breaker comprising: a body portion having a piston that is repeatedly moved upward/downward by a hydraulic pressure introduced therein from the outside or discharged therefrom to the outside; a hydraulic pump portion connected to a side surface of the body portion and configured to supply a hydraulic pressure into the body portion or to recover the same therefrom; a head cap portion coupled to the upper side of the body portion, the interior of the head cap portion being filled with nitrogen gas such that, when the piston is moved upward by introduction of the hydraulic pressure, the head cap portion is compressed and, when the hydraulic pressure is discharged, the head cap portion pressurizes the upper side of the piston and pushes the same downward; a front head portion coupled to the lower side of the body portion, the front head portion having a chisel that is struck by the piston, when the piston moves downward, and applies an impact to an object abutting an end portion of the chisel; and an air pump portion for supplying air into the front head portion and thereby forming an air pocket in order to prevent water from infiltrating into the front head portion when the underwater hydraulic breaker operates underwater, wherein the underwater hydraulic breaker has a wire coupled to the upper side of the head cap portion such that the same is hung by own weight and thereby maintains the position thereof.

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Inventors:
KANG, Do Ho (2F 18 Geumwan-ro, Yeongcheon-si, Gyeongsangbuk-do, 38885, KR)
Application Number:
KR2017/014691
Publication Date:
May 02, 2019
Filing Date:
December 14, 2017
Export Citation:
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Assignee:
KANG, Do Ho (2F 18 Geumwan-ro, Yeongcheon-si, Gyeongsangbuk-do, 38885, KR)
International Classes:
B25D9/08; B25D9/04; B25D17/28
Foreign References:
JP2001200540A2001-07-27
KR100901145B12009-06-04
JPH0957653A1997-03-04
KR100758113B12007-09-11
KR20160107431A2016-09-19
Attorney, Agent or Firm:
NURY PATENT LAW FIRM (4F 15-5, Teheran-ro 25-gilGangnam-gu, Seoul, 06131, KR)
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