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:
Oct. 30, 2001
Filed:
Jun. 28, 1999
Westonbridge International Limited, Dublin, IR;
Abstract
A micropump including at least one main plate (,), at least one upper plate (,), and a middle plate (,) arranged between the other two plates (,) and forming a pumping chamber (,) that is connected with at least one inlet of the micropump and at least one outlet of the micropump. The pumping chamber comprises a movable wall (,) machined into the middle plate (,); the upper plate is equipped with at least one opening (,) linking a cavity (,) with at least one portion of the movable wall (,). Actuation devices (,) attached to the free surface of the upper plate (,) are used to shift said movable wall (,) in order to bring about a periodic variation in the volume of the pumping chamber (,). According to the invention, the actuating devices (,) are formed by an actuating plate (,) of a material which can be machined so as to define a movable area (,) and said cavity (,). A (sic) intermediate part (,), formed from the upper plate (,), is fastened to the actuating plate (,) (sic) so as to establish contact with the movable wall (,).