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. 28, 2022
Filed:
Nov. 28, 2017
Snu R&db Foundation, Seoul, KR;
SNU R&DB FOUNDATION, Seoul, KR;
Abstract
Provided is a micro-jet drug injection device comprising: a pressure chamber having a pressure driving liquid hermetically filled therein; a drug chamber having a micro nozzle defined in a wall; an elastic membrane elastically expandable and restorable and to separate the pressure chamber from the drug chamber; an energy-focusing unit concentrating energy on the pressure driving liquid in the pressure chamber; and the storage unit supplying the drug solution therein into the drug chamber through a drug supply channel. The drug chamber has a partial inner space defined therein. The partial inner space is in fluid communication with the drug supply channel and is partially defined by the membrane. A nozzle closure is disposed inside or outside the drug chamber. The nozzle closure blocks inflow of air outside the micro-nozzle into the partial inner space after the elastic membrane has expanded and before elastic recovery of the membrane is completed.