| 20090018509 | Cartridge liquid injector - A cartridge liquid injector includes a drive motor rotatable in forward and reverse directions, for applying driving force, a reduction portion reducing a speed of rotational output of the drive motor, a linear motion portion converting rotational output of the reduction portion to linear motion, a plunger pushed forward or pulled back by the linear motion portion to move forward an injection plug of a cartridge, and a reduction ratio switching portion switching a reduction ratio of the reduction portion such that the reduction ratio in pulling back the plunger is lower than the reduction ratio in pushing forward the plunger. | 01-15-2009 |
