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:
Mar. 11, 2008
Filed:
Jan. 27, 2006
Scott Mallett, Coto de Caza, CA (US);
Scott Mallett, Coto de Caza, CA (US);
Phluid, Inc., Denver, CO (US);
Abstract
A fluid dispensing system provides a non-contact method of monitoring the change in the fluid volume over time. This approach avoids the use of probes or sensors that come into direct contact with the fluid to be dispensed. The system comprises an apparatus comprising three chambers. The first chamber has a fixed volume and contains a pressurized gas. A solenoid valve is used to control the flow of gas from the first chamber into the second. The second chamber is sealed so that the combined mass of air in the first and second chambers remains fixed. The third chamber is adjacent to the second and contains medication in the form of incompressible fluid that is to be administered to a human or animal subject via a suitable delivery port. A piston is disposed between the second and third chambers and is movable responsive to the flow of gas into the second chamber to dispense fluid from the third chamber as desired. By sensing the pressure in the first and second chambers at any point in time, a processor is programmed to calculate the flow rate or dispensed volume of the fluid being delivered using principles derived from the Ideal Gas Law.