US 5,780,958 A · Piezoelectric vibrating device

Abstract

A piezoelectric vibrating device is disclosed. The device includes a case having a first compartment with a first compartment height. A bender element, fabricated from an piezoelectric material, is disposed within the first compartment. A motion limiter is disposed within the case for preventing damage to the bender. The motion limiter has a first portion that abuts against the case to prevent the first compartment height from compressing beyond a predetermined first compartment minimal height. The device further includes electronic controls for providing a signal to the bender element. The electronic controls further include an optimal wave form signal generator. The wave form may also be a square wave, pulse train, truncated wave or other type of wave depending on each particular application.

Claims2

Dependent claims

A piezoelectric vibrating device comprising:

a case having a first compartment and a second compartment, said first compartment defining a vertical axis and having a first compartment height along said vertical axis, said second compartment having a second compartment height;
a bender element fabricated from an electroactive material, said bender element disposed within said first compartment and further wherein at least a portion of said bender element being axially moveable within said first compartment;
and
a motion limiter disposed within said case for preventing damage to said bender element, said motion limiter having a first portion that abuts against said case to prevent said first compartment height from axially compressing beyond a predetermined first compartment minimal height, said motion limiter further having a second portion that abuts against said case to prevent said second compartment height from compressing beyond a predetermined second compartment minimal height.

1 more element

Dependencies are inferred from the claim text.

Piezoelectric vibrating device

Life of this patent

Piezoelectric vibrating device

Life of this patent

Abstract

Claims2