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:
Apr. 15, 2008
Filed:
May. 24, 2004
Patrick Alexandre, Gray, FR;
Patrick Cognot, Le Mee sur Seine, FR;
Joel Lafforgue, Itteville, FR;
Denis Roller, La Ferte Alais, FR;
Patrick Alexandre, Gray, FR;
Patrick Cognot, Le Mee sur Seine, FR;
Joel Lafforgue, Itteville, FR;
Denis Roller, La Ferte Alais, FR;
Crossject, Paris, FR;
Abstract
The technical field of the invention is that of pre-filled and disposable needleless syringes, used for intradermal, subcutaneous and intramuscular injections of liquid active principle for therapeutic use in human and veterinary medicine. The inventive syringes () are mainly characterized in that they function with a pyrotechnic charge () consisting of a mixture of powder with high burning rate and a powder with low burning rate. Indeed, the combustion of the powder with a high burning rate enables to communicate instantly, through a piston (), a very high speed to the active principle (), whereas the combustion of the powder with a low burning rate enables to maintain a threshold pressure level to proceed with the injection, so as to ensure that the active principle () penetrates through the skin. Thus, the injection is properly and homogeneously without any loss of active liquid ().