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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0855658 (1977-11-30) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 2 인용 특허 : 1 |
Hydraulic actuation of a device for delivering impact energy to a load, such as a pile driver, is provided by a hydraulically operated oscillator having a piston which is reciprocal in a cylinder under hydraulic forces developed by pressurized hydraulic fluid in the cylinder which is switched from s
In a hydraulically operated oscillator for developing impact energy which is adapted to be delivered to a load, and having a housing, a cylinder in said housing, a piston reciprocable in said cylinder, said piston having an area facing an active chamber in said cylinder, a valve having a member reci
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