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:
Aug. 04, 2009
Filed:
Jan. 13, 2004
Brian Blischak, Allen, TX (US);
Brian Blischak, Allen, TX (US);
Advanced Neuromodulation Systems, Inc., Plano, TX (US);
Abstract
The invention relates to multi-stable valves and methods for their use. The multi-stable valves may include a movable physical stop and a position arm. The physical stop may be placed in the path of the arm effectively locking the valve in at least one position upon deactivation of the valve's motivating forces. The valve may be, for example, a micro valve or a microelectromechanical device. Such a valve may be used in implantable drug infusion applications and other applications having limitations on available energy. In one exemplary embodiment, the valve comprises a membrane separating two channels. The membrane may be lifted by activation of a piezo material, opening the channels for fluid flow. A physical stop may be moved into place and the piezo material deactivated, bringing to rest the arm on the physical stop. In this manner, the valve is stabilized in the open position without requiring continuous supply of energy.