The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 2009
Filed:
Sep. 10, 2004
Hye-jung Cho, Anyang-si, KR;
Xiaobing Luo, Yongin-si, KR;
Zhaoying Zhou, Beijing, CN;
Xing Yang, Beijing, CN;
Xiongying YE, Beijing, CN;
Hye-jung Cho, Anyang-si, KR;
Xiaobing Luo, Yongin-si, KR;
Zhaoying Zhou, Beijing, CN;
Xing Yang, Beijing, CN;
Xiongying Ye, Beijing, CN;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Tsinghua University, Beijing, CN;
Abstract
A diaphragm air pump comprises a pump chamber, a diaphragm and one or more piezoelectric beams or bimorphs. Fluid flows into the pump chamber and then flows out of it, the diaphragm is provided within the pump chamber, and one or more central openings are formed in the diaphragm. One or more central check valves are provided in the central openings. The diaphragm is just bonded with piezoelectric beams, not fixed to the lower housing of the pump chamber in order to get large displacement. With the provided diaphragm air pump, it is possible to actively adjust the air quantity according to the requirement for fuel cell or a part-to-be-cooled, and it is also possible to reduce noise and power consumption compared with a conventional fan type cooler or air pumps.