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. 19, 2010
Filed:
Apr. 29, 2008
John Hoffman, Poway, CA (US);
James A. Benjamin, San Diego, CA (US);
Janet M. Newman, Melbourne, AU;
John Andrew Moulds, Encinitas, CA (US);
David W Jewell, San Diego, CA (US);
John A. Adams, Escondido, CA (US);
Thomas E. Vomdran, Oceanside, CA (US);
Brian L. Ganz, Carlsbad, CA (US);
John Hoffman, Poway, CA (US);
James A. Benjamin, San Diego, CA (US);
Janet M. Newman, Melbourne, AU;
John Andrew Moulds, Encinitas, CA (US);
David W Jewell, San Diego, CA (US);
John A. Adams, Escondido, CA (US);
Thomas E. Vomdran, Oceanside, CA (US);
Brian L. Ganz, Carlsbad, CA (US);
Rigaku Automation, Inc., Carlsbad, CA (US);
Abstract
A liquid dispensing device. The liquid dispensing device has a tray for holding a liquid at a relatively constant level. A syringe is used for drawing fluid from the tray. A liquid container containing a liquid is positioned upside-down in the tray. Atmospheric pressure on the liquid in the tray and a vacuum inside the liquid container prevents liquid from draining from the container except when the liquid level in the tray drops to a level sufficient to allow air into the liquid container and to allow fluid to flow from the liquid container into the tray. The fluid flows from the liquid container into the tray until the level of liquid in the tray returns to the relatively constant level. The positioning of the syringe for drawing fluid is simplified in that the level of fluid in the tray is maintained at an approximately constant level despite withdrawal of quantities of fluid from the tray.