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1. 发明申请

US20230018715A1 HYDRAULIC BREAKER 有权
公开(公告)号：US20230018715A1
公开(公告)日：2023-01-19
申请号：US17783459
申请日：2020-12-16
申请人： HYUNDAI EVERDIGM CORPORATION
发明人： Kwang Pyo KO , Jin Kook KIM
IPC分类号： B25D9/12 , F15B15/02 , B02C1/00
摘要： The present invention relates to a hydraulic breaker. The valve is installed on an inner surface of the cylinder bush and the cylinder inner diameter portion to be movable in the vertical direction. The valve includes an upper valve portion having an upper end surface on which the pressure of the upper cylinder chamber acts, a lower valve portion having a lower end surface on which the pressure of the upper cylinder chamber acts, a first valve expanded-diameter portion which is formed between the upper valve portion and the lower valve portion, of which an outer diameter expands to be greater than outer diameters of the upper valve portion and the lower valve portion, and in which a first upper valve hydraulic pressure area communicates with the first and second flow channels, and a second valve expanded-diameter portion which is formed between the first valve expanded-diameter portion and the lower valve portion, of which an outer diameter expands to be greater than an outer diameter of the first valve expanded-diameter portion, and in which the second upper valve hydraulic pressure area communicates with the fourth flow channel, and the pressure of the valve switching chamber acts on a lower valve hydraulic pressure area having an area greater than an area of the first upper valve hydraulic pressure area.

2. 发明授权

US12109674B2 Hydraulic breaker 有权
公开(公告)号：US12109674B2
公开(公告)日：2024-10-08
申请号：US17783459
申请日：2020-12-16
申请人： HYUNDAI EVERDIGM CORPORATION
发明人： Kwang Pyo Ko , Jin Kook Kim
IPC分类号： B25D9/12 , B02C1/00 , E02D7/10 , E02F3/96 , F15B15/02
CPC分类号： B25D9/12 , B02C1/005 , F15B15/02 , B25D2250/125 , E02D7/10 , E02F3/966
摘要： The present invention relates to a hydraulic breaker. The valve is installed on an inner surface of the cylinder bush and the cylinder inner diameter portion to be movable in the vertical direction. The valve includes an upper valve portion having an upper end surface on which the pressure of the upper cylinder chamber acts, a lower valve portion having a lower end surface on which the pressure of the upper cylinder chamber acts, a first valve expanded-diameter portion which is formed between the upper valve portion and the lower valve portion, of which an outer diameter expands to be greater than outer diameters of the upper valve portion and the lower valve portion, and in which a first upper valve hydraulic pressure area communicates with the first and second flow channels, and a second valve expanded-diameter portion which is formed between the first valve expanded-diameter portion and the lower valve portion, of which an outer diameter expands to be greater than an outer diameter of the first valve expanded-diameter portion, and in which the second upper valve hydraulic pressure area communicates with the fourth flow channel, and the pressure of the valve switching chamber acts on a lower valve hydraulic pressure area having an area greater than an area of the first upper valve hydraulic pressure area.

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