Patent ID: 7322803

Claim:
A pump comprising: a first piezoelectric diaphragm having a first piezoelectric diaphragm edge; a second piezoelectric diaphragm having a second piezoelectric diaphragm edge; a bond formed essentially around peripheries of the first piezoelectric diaphragm edge and the second piezoelectric diaphragm edge so that a bellows chamber is formed between the first piezoelectric diaphragm and the second piezoelectric diaphragm and in a manner so that the first piezoelectric diaphragm edge and the second piezoelectric diaphragm edge exert a force against each other when displaced; an inlet port formed in the first piezoelectric diaphragm or the second piezoelectric diaphragm; an outlet port formed in the first piezoelectric diaphragm or the second piezoelectric diaphragm.