| US 7,513,112 B2 | ||
| Reservoir built-in type actuator | ||
| Tetsuji Sato, Hyogo (Japan); and Masahito Kamada, Takatsuki (Japan) | ||
| Assigned to Sumitomo Precision Products Co., Ltd., Amagasaki-shi (Japan) | ||
| Filed on Mar. 12, 2007, as Appl. No. 11/717,306. | ||
| Claims priority of application No. 2006-067408 (JP), filed on Mar. 13, 2006. | ||
| Prior Publication US 2007/0209357 A1, Sep. 13, 2007 | ||
| Int. Cl. F16D 31/02 (2006.01) | ||
| U.S. Cl. 60—475 [60/413] | 4 Claims |
| 1. An actuator in which a cylinder type actuator body and a piston having a piston rod with a hollow structure adapted to
slide through the interior of the cylinder of said actuator body are included, comprising:
a motor;
a pump for the supply of fluid in accordance with revolutions of said motor;
a controller for controlling revolutions of said motor in accordance with movement of said piston; and
a reservoir for adjusting the amount of fluid to be supplied in accordance with a flow rate difference induced with movement
of said piston, wherein a stand pipe is disposed so as to be fitted with the inner periphery surface of said piston rod and
said reservoir is incorporated into the inside of said stand pipe.
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