Patent ID: 11858007
Assignee: SATAKE CORPORATION
Field: Chemical engineering (Chemistry)
Classification: CPC B  Y | IPC B

Claim 3:
4. The optical granular matter sorter according to claim 1, wherein
the air ejecting unit includes a piezoelectric valve configured to open and close the valve utilizing a displacement of a piezoelectric element,
the piezoelectric valve has a gas pressure chamber configured to receive a compressed gas supplied from outside and a gas discharge channel through which the compressed gas is configured to be discharged from the gas pressure chamber,
the piezoelectric valve further has a valve body, disposed in the gas pressure chamber and configured to open and close the gas discharge channel, the piezoelectric element configured to produce a driving force required to move the valve body as a displacement, and a displacement enlarging mechanism configured to enlarge the displacement of the piezoelectric element so as to be acted on the valve body, and
a voltage is applied to the piezoelectric element to expand the piezoelectric element and open the valve body.