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:
Jul. 23, 2002
Filed:
Dec. 10, 1999
Igal Ladabaum, San Carlos, CA (US);
Alissa M. Fitzgerald, Menlo Park, CA (US);
Sensant Corporation, San Jose, CA (US);
Abstract
The present invention provides an ultrasonic resonant cavity droplet ejector with localized excitation and a method for making the same. In a resonant cavity with an ultrasonic transducer acting as one of the cavity walls, the energy input from the transducer coupled with the gain of the resonant cavity causes a droplet to be ejected from a nozzle in the cavity wall. In addition, a refill channel can be introduced such that the cavity can be refilled without affecting cavity gain. Arrays of such locally excitable ejector cavities are useful in numerous applications, including, among others, ink-jet printing, DNA chip printing, and fuel injectors.