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:
Dec. 02, 2003
Filed:
Mar. 22, 2002
Thomas Lisec, Itzehoe, DE;
Bernd Wagner, Looft, DE;
Abstract
A micromechanical pump has a membrane ( ) positioned above a substrate ( ). The substrate is provided with a cavity ( ) which is formed in an endlessly continuous shape (e.g., circular) to provide a channel for a drive fluid. A cover ( ) is positioned above the substrate with the membrane being between the substrate and cover. The cover is provided with an inlet ( ) and outlet ( ). Electrodes ( ) are provided around the floor of the cavity. The electrodes are selectively actuated so as to attract selected areas of the membrane resulting in a gap forming between the cover and the selected areas of the membrane. The areas of the membrane above the non-selected electrodes form a seal with the cover. By selectively actuating the electrodes a peristaltic pumping action results in a pumped fluid traveling from the inlet, through the gaps and out the outlet.