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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0496448 (2000-02-02) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 61 인용 특허 : 51 |
An actuator assembly includes an operating actuator and a holding actuator that are engageable with an operator member of a device. The operating actuation is cycled between on and off states to move the operator member in incremental steps, and the holding actuator is maintained in an active state
1. An apparatus for operating a device in a wellbore, comprising:at least a first and at least a second actuator activable by an input energy; and at least an operator member adapted to be moved in incremental steps by the first actuator and latched in its current position tby he second actuator, wh
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