Needleless syringe functioning by compression of the reservoir containing the liquid active principle

Needleless syringe functioning by compression of the reservoir containing the liquid active principle

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 (1) is m...

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Hauptverfasser: PECH BERNARD, ALEXANDRE PATRICK, BROUQUIERES BERNARD
Format: Patent
Sprache:eng
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DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY
DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY
HUMAN NECESSITIES
HYGIENE
MEDICAL OR VETERINARY SCIENCE
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creator PECH BERNARD
ALEXANDRE PATRICK
BROUQUIERES BERNARD
description 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 (1) is mainly characterized in that it has a free pressuring space (26) around the reservoir (20) of the active principle (17) so that the gases produced by the gas generator (4) instantly penetrate said pressurizing space (26), compressing said reservoir (20) just before causing the plunger to move (18) to expel the liquid active principle (17). During said displacement, the reservoir (20) is subjected to a state of equal pressure.
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subjects DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY
DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY
HUMAN NECESSITIES
HYGIENE
MEDICAL OR VETERINARY SCIENCE
title Needleless syringe functioning by compression of the reservoir containing the liquid active principle
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