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1. WO2014080417 - SELF-RETRACTABLE SAFETY SYRINGE FOR SINGLE USE

Publication Number WO/2014/080417
Publication Date 30.05.2014
International Application No. PCT/IN2013/000622
International Filing Date 15.10.2013
IPC
A61M 5/32 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
5Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm rests
178Syringes
31Details
32Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
A61M 5/00 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
5Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm rests
CPC
A61M 2005/3238
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY
5Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
178Syringes
31Details
32Needles; Details of needles pertaining to their connection with syringe or hub
3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
321Means for protection against accidental injuries by used needles
322Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
3234Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user
3235triggered by radial deflection of the anchoring parts between needle mount and syringe barrel or needle housing, e.g. spreading of needle mount retaining hooks having slanted surfaces by engagement with correspondingly shaped surfaces on the piston at the end of an injection stroke
3238Trigger provided at the proximal end, i.e. syringe end opposite to needle mounting end
A61M 5/3234
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY
5Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
178Syringes
31Details
32Needles; Details of needles pertaining to their connection with syringe or hub
3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
321Means for protection against accidental injuries by used needles
322Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
3234Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user
A61M 5/508
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY
5Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
50having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
508Means for preventing re-use by disrupting the piston seal, e.g. by puncturing
Applicants
  • RATHORE, Jai Hind [IN]/[IN]
  • RATHORE, Bharati [IN]/[IN]
  • RATHORE, Pratibha [IN]/[IN]
  • RATHORE, Neelam [IN]/[IN]
  • RATHORE, Bhuvan, Chandra [IN]/[IN]
Inventors
  • RATHORE, Jai Hind
  • RATHORE, Bharati
  • RATHORE, Pratibha
  • RATHORE, Neelam
  • RATHORE, Bhuvan, Chandra
Common Representative
  • RATHORE, Jai Hind [IN]/[IN]
Priority Data
3601/DEL/201223.11.2012IN
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SELF-RETRACTABLE SAFETY SYRINGE FOR SINGLE USE
(FR) SERINGUE DE SÉCURITÉ AUTO-RÉTRACTABLE (SRS) À USAGE UNIQUE
Abstract
(EN)
The present subject matter relates to self-retractable safety syringe (100) for single use comprising a plunger assembly including a plunger barrel (102) and a plunger plug (103), a needle carrier assembly (114), and an outermost barrel (108). The plunger plug (103) holding a centrally positioned furrowed axial knob (134) housed in plunger barrel (102) at the proximal end and firmly held by the inner teeth T-2 & T-4 of finger locks (126) and (128) respectively. A needle carrier assembly (114) is housed in conical jacket of outermost barrel 108 holding a needle (110) along with a compressed spring (184). The needle is locked inside the needle carrier assembly with the help of finger lock (166) provided with outwardly protruded flange (168). The flange (168) is placed in contact with a slidable elastic O-ring (182) holding the needle carrier assembly inside the conical jacket. At the completion of injection process, the furrowed knob inserts into the distal cavity of needle (110) to lock the needle with plug. When the elastic O-ring slides in forward direction due to the axial movement of plunger barrel in forward direction, the O-ring pushes the flange (168) of finger lock (166), to unlock the lock. At the same time, the teeth outer T- 1 & T-3 of the finger locks (126) & (128) respectively become in alignment of inner circumferential conical groove (148) of outermost barrel (108) and restore their normal state by expanding in outward direction to occupy the outer space provided by the groove (148). This result the respective inner teeth T-2 & T-4 of the finger locks (126) & (128) to retract and release the plunger plug (103) due to expansion of locks in outward direction. Consequently, the plunger plug (103) holding the (needle 110) moves smoothly in backward direction due to the pressure exerted by expansion of (spring 184) in backward direction. Simultaneously, the finger lock (124) provided at the distal end of plunger barrel (102) slips into the inner circumferential conical groove (146) and click locks the plunger barrel (102) inside the outermost barrel (108) to render the syringe assembly completely locked with the needle encapsulated within the plunger barrel. The distally directing, outwardly protruded finger locks (125) and (127) provided at the proximal end of plunger barrel prevent the removal of plunger barrel (102) from the outermost barrel (108).
(FR)
La présente invention concerne une seringue de sécurité auto-rétractable (100) à usage unique comprenant un ensemble piston comprenant un cylindre à piston (102) et un bouchon de piston (103), un ensemble support d'aiguille (114) et un cylindre extérieur (108). Le bouchon de piston (103) retient un bouton axial strié à position centrale (134) logé dans le cylindre à piston (102) au niveau de l'extrémité proximale et maintenu fermement par les dents internes T-2 et T-4 de verrous à doigt (126) et (128), respectivement. Un ensemble support d'aiguille (114) est logé dans une gaine conique du cylindre extérieur (108) retenant une aiguille (110) ainsi qu'un ressort comprimé (184). L'aiguille est verrouillée à l'intérieur de l'ensemble support d'aiguille à l'aide du verrou à doigt (166) pourvu d'une bride faisant saillie vers l'extérieur (168). La bride (168) est mise en contact avec un joint torique élastique coulissant (182) retenant l'ensemble support d'aiguille à l'intérieur de la gaine conique. Au terme du procédé d'injection, le bouton strié s'insère dans la cavité distale de l'aiguille (110) pour verrouiller l'aiguille avec le bouchon. Lorsque le joint torique élastique coulisse vers l'avant en raison du mouvement axial du cylindre à piston vers l'avant, le joint torique pousse la bride (168) du verrou à doigt (166) pour déverrouiller le verrou. Au même moment, les dents externes T-1 et T-3 des verrous à doigt (126) et (128) s'alignent respectivement avec la rainure conique circonférentielle interne (148) du cylindre extérieur (108) et reprennent leur état normal en s'étendant vers l'extérieur pour occuper l'espace externe fourni par la rainure (148). Cela amène les dents internes respectives T-2 et T-4 des verrous à doigt (126) et (128) à se rétracter et à libérer le bouchon de piston (103) en raison de l'expansion des verrous vers l'extérieur. Par conséquent, le bouchon de piston (103) retenant l'aiguille (110) se déplace en douceur vers l'arrière en raison de la pression exercée par l'expansion du ressort (184) vers l'arrière. Simultanément, le verrou à doigt (124) disposé au niveau de l'extrémité distale du cylindre à piston (102) glisse dans la rainure conique circonférentielle interne (146) et verrouille par encliquetage le cylindre à piston (102) à l'intérieur du cylindre extérieur (108) pour verrouiller complètement l'ensemble seringue avec l'aiguille encapsulée à l'intérieur du cylindre à piston. Les verrous à doigt faisant saillie vers l'extérieur et orientés de manière distale (125) et (127) disposés au niveau de l'extrémité proximale du cylindre à piston empêchent le retrait du cylindre à piston (102) du cylindre extérieur (108).
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