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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2018/021801
Kind Code:
An intelligent hydraulic breaker according to an embodiment of the present invention comprises: a cylinder supplied with hydraulic pressure; a piston contained in the cylinder and moved forward or backward by the hydraulic pressure; a chisel positioned in front of the piston such that the same is struck by the piston, one end of the chisel being positioned inside the cylinder, and the other end thereof being positioned on the front end of the cylinder while being exposed; a main valve for allowing/blocking supply of hydraulic pressure through a long-stroke port and to a short-stroke port, which are formed in the cylinder, thereby controlling the forward or backward movement of the piston; a sensor formed on the cylinder so as to sense the position of the piston inside the cylinder; a solenoid valve having a hydraulic pressure connection with the main valve so as to allow/block supply of hydraulic pressure through the short-stroke port; and a controller for delivering a control signal to the solenoid valve on the basis of a sensing value delivered from the sensor, wherein the controller controls the stroke distance of the piston on the basis of a sensing value obtained when the sensor senses the bottom dead center of the piston, and the sensor may be formed on the cylinder such that, when striking of the chisel by the front end of the piston is followed by movement of the chisel through a striking object, the sensor is positioned within the stroke distance moved by the piston.

LIM, Hoon (102-1101, 7 Hasin 3-gil,,Gunsan-si, Jeollabuk-do, 54133, KR)
YOON, Bok Joong (105-101, 66 Gyeongpocheon-ro,,Gunsan-si, Jeollabuk-do, 54086, KR)
JOO, Jin Moo (208-1302, 60 Guil-ro 2-gil,,Guro-gu, Seoul, 08325, KR)
Application Number:
Publication Date:
February 01, 2018
Filing Date:
July 25, 2017
Export Citation:
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KOREA CONSTRUCTION EQUIPMENT TECHNOLOGY INSTITUTE (36 Sandan-ro, Gunsan-si, Jeollabuk-do, 54004, KR)
DAEMO ENGINEERING CO., LTD. (15 Gunjacheon-ro, Siheung-si, Gyeonggi-do, 15102, KR)
International Classes:
E02F3/96; E02F5/30; E02F9/22; F15B21/08
Attorney, Agent or Firm:
YOO, Byung Wook et al. (2nd Floor, Baeknyeon Building 9, Yeoksam-ro 15-gil,,Gangnam-gu, Seoul, 06245, KR)
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