Apparatus for driving piezoelectric element for closing and open

Details Apparatus for driving piezoelectric element for closing and open Apparatus for driving piezoelectric element for closing and open

1989-11-29

1991-10-15

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310316, 123478, 123498, H01L 4108, B05B 314

Patent

active

050577344

ABSTRACT:
In an apparatus for driving a piezoelectric element used for closing and opening a valve member, a first-step voltage is applied to the piezoelectric element to move the valve element near to a valve seat, and thereafter, a second-step voltage higher than the first-step voltage is applied to the piezoelectric element to seat the valve element securely on the valve seat.

REFERENCES:
patent: 4644212 (1987-02-01), Moritugu et al.
patent: 4705003 (1987-11-01), Sakakibara
patent: 4732129 (1988-03-01), Takigawa et al.

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