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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||166/664 ; 166/332 ; 251/1292 ; 251/12921|
|우선권정보||GB-0022883 (1989-10-11); GB-0001905 (1990-01-27)|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 32 인용 특허 : 0|
A mechanical actuator operated by electrical power suitable for actuating down hole equipment in a well, e.g. down hole safety valves, has an electric motor, a gear assembly with a mechanical advantage of at least 30:1, a two-part drive sleeve, the parts being connected by, e.g. splines so that the two parts can rotate together while capable of relative axial movement, an actuating sleeve moved axially by rotation of the drive sleeve, and a releasable lock operated by a solenoid to lock the two parts of the drive sleeve against relative axial movement. R...
A mechanical actuator operated by electrical power, suitable for actuating down hole equipment in a well comprising an electric motor, said motor driving a gear assembly having a drive gear and operating gear, said assembly being designed to give a mechanical advantage of at least 30:1 between the drive gear and operating gear, the later engaging with a drive sleeve, formed in two parts, said two parts being connected so that they rotate together but are capable of relative axial movement, one end of one part engaging with the gear assembly and the other...