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Patent Searching and Data


Title:
HYDRAULIC HAMMER AND CONSTRUCTION APPARATUS COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2018/021641
Kind Code:
A1
Abstract:
The present invention relates to a hydraulic hammer and a construction apparatus comprising same, the hydraulic hammer comprising: a cylinder; a piston; a backward port connecting a front chamber of the cylinder to a hydraulic source; a forward port formed on a rear chamber of the cylinder; a forward/backward valve for controlling the forward and backward movement of the piston; a control line for moving the forward/backward valve to a forward-movement location; a long-stroke port formed between the forward port and the backward port; a short-stroke port formed between the backward port on the cylinder and the long-stroke port; a shift valve disposed between the short-stroke port and the control line; a vibration sensor for detecting a vibration due to a stroke on an object; and a controller for determining a striking condition on the basis of the detected vibration, and transmitting a control signal to the shift valve.

Inventors:
JOO, Jin Moo (#208-1302, 60 Guil-ro 2-gil,Guro-gu, Seoul, 08325, KR)
Application Number:
KR2017/001317
Publication Date:
February 01, 2018
Filing Date:
February 06, 2017
Export Citation:
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Assignee:
DAEMO ENGINEERING CO., LTD. (15 Gunjacheon-ro, Siheung-si, Gyeonggi-do, 15102, KR)
International Classes:
E02F3/96; B25D9/04; E02D7/10; E02F5/30; E02F9/22
Attorney, Agent or Firm:
IPS PATENT FIRM (5th Fl, 14 Banpo-daero 23-gil,Seocho-gu, Seoul, 06656, KR)
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