Patent ID: 11927274
Assignee: M-SYSTEM CO., LTD.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  G | IPC F  G

Claim 0:
1. An actuator comprising:
a control unit configured to allow a first control capable of driving a drive part with a first driving force and a second control capable of driving the drive part with a second driving force which is stronger than the first driving force;
a moving part configured to move in a predetermined direction;
an elastic member configured to receive at least one of the first driving force and the second driving force from the drive part and to supply a force for the moving part to move to the moving part; and
a storage unit configured to store an amount of movement by which the drive part is caused to move by the second control in order to realize retightening a valve device, wherein
the control unit starts a driving of the drive part by the first control, then ends the first control when the driving of the drive part has stopped, and causes the storage unit to store a predetermined position which is apart from a position, at which the drive part stops under the first control, by the amount of movement of the drive part along a direction in which the drive part is driven under the first control, and
the control unit drives the drive part by the second control to the predetermined position stored in the storage unit to retighten the valve device.