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:
Jul. 14, 2009
Filed:
Jul. 27, 2001
Patrick Alexandre, Gray, FR;
Bernard Brouquieres, Toulon, FR;
Bernard Pech, Paris, FR;
Crossject, Paris, FR;
Abstract
The invention concerns the field of pre-filled and disposable needleless syringes, operating with a gas generator and used for intradermal, subcutaneous and intramuscular injections of a liquid active principle for therapeutic purposes in human and veterinary medicine. Said injection device () is mainly characterized in that it has a free pressuring space () around the reservoir () of the active principle () so that the gases produced by the gas generator () instantly penetrate said pressurizing space (), compressing said reservoir () just before causing the plunger to move () to expel the liquid active principle (). During said displacement, the reservoir () is subjected to a state of equal pressure.