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:
Jun. 05, 2007
Filed:
Aug. 01, 2005
Lawrence W. Darnell, Cypress, TX (US);
Lawrence W. Darnell, Cypress, TX (US);
Alcon, Inc., Hunenberg, CH;
Abstract
A syringe-like device having a chamber in which a pressurizing piston reciprocates. The chamber is connected on one end to a vial containing a drug to be delivered to an eye and on the other end to a needle or cannula for administering the drug to an eye. Pulling proximally backwards on the piston creates a vacuum in the chamber and draws the drug out of the vial. Upon release of the piston, a spring pushes the piston forward, pressurizing the chamber. Delivery of the drug is controlled by a roller pinching off a section of compliant tubing between the chamber and the cannula, with a design similar to a peristaltic pump. A one-way valve prevents the drug from being expelled back into the vial. The flow rate of the drug out of the cannula can be controlled by rotation of the roller.