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:
Sep. 20, 2011
Filed:
Feb. 25, 2002
Joseph Hess, Bevaix, CH;
Jean-marc Flick, Savagnier, CH;
HU BO, Neuchatel, CH;
Philippe Luginbuhl, Nods, CH;
Raphael Weber, La Chaux-de-Fonds, CH;
Joseph Hess, Bevaix, CH;
Jean-Marc Flick, Savagnier, CH;
Hu Bo, Neuchatel, CH;
Philippe Luginbuhl, Nods, CH;
Raphael Weber, La Chaux-de-Fonds, CH;
EP Systems SA, Neuchâtel, CH;
Abstract
The invention concerns a liquid droplet spray device for atomising a liquid substance, Its housing consists of a at least a first substrate (), a space () within the housing for containing the supplied liquid substance, an outlet means arranged in the first substrate () and comprising at least one outlet nozzle () and at least one output channel (), said output channel () having straight side-walls, and a vibrating element () for vibrating the liquid so as to eject it. According to the present invention, each output channel () has a stepped shape having a lower portion () and an upper portion (), the lower portion being arranged adjacent the space () and being of larger diameter than the upper portion (). The outlet nozzle () of each output channel is straight and does not show notching effects. The invention also concerns a method of manufacturing such device using a differential etching technique to obtain the stepped shape output channel without notching effects on the outlet nozzle.