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:
Sep. 07, 2001
John B. Slate, San Diego, CA (US);
Michael W. Burk, San Marcos, CA (US);
Lanny A. Gorton, San Diego, CA (US);
Avant Drug Delivery Systems, Inc., San Diego, CA (US);
Abstract
A vacuum control system for a jet injector includes a power source and vacuum pump for creating suction at the injector tip. The injector includes a drive bar to expel medicament into the patient. Before injection the drive bar and an inner barrel are separated from each other, and at the end of the injection the drive bar contacts the inner barrel. A user operable switch that is moveable between an ON position and an OFF position is also provided. The power source, vacuum pump, drive bar, inner barrel and user operable switch are all electrically connected via an electrical circuit. The electrical circuit is configured to activate the vacuum pump when the user operable switch is in the ON position and the drive bar is separated from the inner barrel, and to deactivate the vacuum pump when the drive bar contacts the inner barrel.