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. 28, 2004
Filed:
Sep. 04, 2002
Applicant:
Inventors:
Patrick Alexandre, Gray, FR;
Georges Baud, La Crau, FR;
Philippe Gautier, Le Plessis Pate, FR;
Denis Roller, La Ferte Alais, FR;
Assignee:
Crossject, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61M 3/700 ; A61M 5/30 ; A61M 3/100 ;
U.S. Cl.
CPC ...
A61M 3/700 ; A61M 5/30 ; A61M 3/100 ;
Abstract
The technical field of the invention is that of needleless syringes used for injecting active principles in powder form for therapeutic purposes. The invention concerns a needleless syringe ( ) comprising successively a gas generator ( ), a gas expanding chamber ( ), means for retaining active particles and an ejection tube ( ). The invention is characterised in that the particle retaining means consists of an inner seal ( ) having at least a cavity ( ), the inner seal ( ) serves both to contain the active principle and to generate a shock wave when it is ruptured.