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. 30, 2003
Filed:
Mar. 26, 2001
Igor Shvets, Castleknock, IE;
Sergei Makarov, Dublin 8, IE;
Alexander Shvets, Castleknock, IE;
Juergen Osing, Rialto, IE;
Allegro Technologies Limited, Dublin, IE;
Abstract
A dispenser ( ) for liquid droplets of the order of 30 &mgr;l or less in volume. The dispenser ( ) comprises a metering valve body ( ) having a main bore ( ) connected by a pipe ( ) to a pressurised liquid delivery source (not shown). The body ( ) comprises a base ( ) from which is mounted a nozzle ( ) projecting above the base ( ) to form a valve seat ( ). An actuating coil assembly ( ) is mounted on the exterior of the body ( ) for moving a floating valve boss ( ) of a ferromagnetic material. Sensing coils ( ) are mounted around and spaced-apart along the body ( ) forming part of a valve boss detector. The valve boss detector acts as a positional movement detector so that the opening and closing of the valve can be accurately controlled and bouncing of the valve boss ( ) either against an end stop ( ) or on the valve seat ( ) can be greatly minimized, if not prevented fully, by careful operation of the actuating coil assembly ( ).