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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
|
출원번호 | US-0453394 (1989-12-19) |
우선권정보 | CH-0000074 (1989-01-11) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 7 인용 특허 : 0 |
The hydraulic jackhammer is provided with a rotor turbine which is driven by a liquid stream in order to activate the tup for driving against a jumper rod. After passing by the turbine rotor, the liquid stream is mixed with air and passed through a nozzle into a guide channel under pressure in order
A hydraulic jackhammer comprising a casing; a jumper rod slidably mounted in said casing; a resiliently mounted tup in said casing for impacting against one end of said jumper rod; a transmission in said casing operatively coupled to said tup for driving said tup in a striking direction towards said
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