Patent ID: 7661933
Filing Date: 2010-02-16
Classification: F04B

Abstract:
1. An electromagnetic vibrational diaphragm pump comprising: an electromagnet portion having an electromagnet arranged in a frame, the electromagnet portion having left and right end portions; a vibrator supported in said electromagnet portion and equipped with magnets, the vibrator having left and right ends; left and right diaphragms with a large diameter and left and right diaphragms with a small diameter successively connected with respective ones of both the left and right ends of said vibrator; left and right pump casing portions of said diaphragms with a large diameter and diaphragms with a small diameter fixed on respective ones of the left and right end portions of said electromagnet portion, said left and right pump casing portions including left and right pump chambers respectively corresponding to the diaphragms with a large diameter and diaphragms with a small diameter; wherein by conducting low pressure air generated in the pump chamber of the left diaphragm with a large diameter to the pump chamber of the right diaphragm with a small diameter and conducting low pressure air generated in the pump chamber of the right diaphragm with a large diameter to the pump chamber of the left diaphragm with a small diameter, an air circuit of the pump has two air circuits each with two compression steps in series for compressing so that medium pressure air of about 50 to 200 kPa is generated by pumping action.