Needleless syringe functioning by shock-tube effect, with prior lateral retention of the active principle
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61M-005/30
A61M-037/00
출원번호
US-0148340
(2000-12-18)
우선권정보
FR-0016536 (1999-12-27)
국제출원번호
PCT//FR00/03567
(2002-05-29)
§371/§102 date
20020529
(20020529)
국제공개번호
WO01//47585
(2001-07-05)
발명자
/ 주소
Alexandre, Patrick
Baud, Georges
Delannoy, Guy
Roller, Denis
출원인 / 주소
Crossject
대리인 / 주소
Oliff &
인용정보
피인용 횟수 :
8인용 특허 :
4
초록▼
The invention concerns a needleless syringe (1) comprising a trigger, a gas generator (2) prolonged by a gas expansion chamber (3), a system for retaining particles and an ejection tube (4). The invention is characterised in that the particles are housed outside the ejection tube conduit (4) and the
The invention concerns a needleless syringe (1) comprising a trigger, a gas generator (2) prolonged by a gas expansion chamber (3), a system for retaining particles and an ejection tube (4). The invention is characterised in that the particles are housed outside the ejection tube conduit (4) and the gases cause the particles to reach inside said tube (4) by displacing a plunger (13), prior to speeding them up by wave shock inside the tube (4).
대표청구항▼
1. A needleless syringe (1, 50, 100) comprising a trigger, a gas generator continued by a gas expansion chamber (3, 53, 103), a piston (13, 76, 113), an ejection tube (4, 54, 104), said particles being housed outside said tube (4, 54, 104), and the gases, emitted by said generator, bringing about th
1. A needleless syringe (1, 50, 100) comprising a trigger, a gas generator continued by a gas expansion chamber (3, 53, 103), a piston (13, 76, 113), an ejection tube (4, 54, 104), said particles being housed outside said tube (4, 54, 104), and the gases, emitted by said generator, bringing about the entry of the particles into the tube (4, 54, 104) by displacement of said piston (13, 76, 113), then their acceleration in said tube (4, 54, 104), characterized in that the piston (13, 76, 113) has a protective seal (14, 79, 114) which is calibrated in such a way that said protective seal (14, 79, 114) is situated upstream of the particles released into the tube (4, 54, 104) and, by yielding at above a threshold pressure, contributes to creating a shock wave intended to entrain said particles.2. The needleless syringe as claimed in claim 1, characterized in that the gas generator is a pyrotechnic generator (2, 52, 102) comprising a pyrotechnic charge (5, 55, 105) and an initiation device.3. The needleless syringe as claimed in claim 1, characterized in that the particles are situated in at least one fixed seat (18, 75a, 75b) outside the conduit of the tube (4, 54), each seat (18, 75a, 75b) being obturated by the piston (13, 76) positioned in said tube (4, 54), said piston (13, 76) being displaceable, under the effect of the gases, in order to open each seat (18, 75a, 75b) and release the particles into the tube (4, 54).4. The needleless syringe as claimed in claim 3, characterized in that a propulsion device allows the particles released by the piston (13, 76) to be thrust into the tube (4, 54) from their seat (18, 75a, 75b).5. The needleless syringe as claimed in claim 4, characterized in that the propulsion device is established by conveying gas via at least one duct (17a, 17b, 67a, 67b) connecting that zone of the chamber (3, 53) situated near the gas generator to the seats (18, 75a, 75b) for the particles.6. The needleless syringe as claimed in claim 5, characterized in that the particles are housed in the end part of each duct (17a, 17b, 67a, 67b), against the piston (13, 76).7. The needleless syringe as claimed in claim 3, characterized in that the piston (13, 76) is formed by a hollow cylindrical body whose side wall has at least one opening (15a, 15b, 78).8. The needleless syringe as claimed in claim 7, characterized in that the tube (4, 54) has a device for arresting and positioning the piston (13, 76) situated between said piston (13, 76) and that end of the tube (4, 54) through which the particles are ejected, each opening (15a, 15b, 78) on the side wall of the piston (13, 76) corresponding with each seat (18, 75a, 75b) for the particles.9. The needleless syringe as claimed in claim 8, characterized in that the piston (13, 76) is positioned in the tube in such a way that the protective seal (14, 79) is situated upstream of the openings (15a, 15b, 78) and said protective seal (14, 79) is calibrated so as to yield at a threshold pressure reached by the gases when the piston (13, 76) is arrested by the limit stop device.10. The needleless syringe as claimed in claim 1, characterized in that the tube (104) has a transverse channel (119) in which is housed the piston (113) which has a solid part (120) and a hollow part (121) containing the particles, and said piston (113), which is housed in the transverse channel (119) so as to initially obturate the tube (104) with its solid part (120), can be displaced along the transverse channel (119), by virtue of a thrust device, until its hollow part (121) is positioned in the continuation of the tube (104).11. The needleless syringe as claimed in claim 10, characterized in that the thrust device is established by conveying gas via a duct (117) connecting that zone of the chamber (103) situated near the gas generator to the transverse channel (119).12. The needleless syringe as claimed in claim 10, characterized in that the transverse channel (119) has a locking means (123) for holding the piston (113) in a position in which its hollow part (121) is situated in the continuity of the tube (104).13. The needleless syringe as claimed in claim 10, characterized in that the hollow part (121) of the piston (113) containing the particles is initially closed by the wall of the transverse channel (119).14. The needleless syringe as claimed in claim 10, characterized in that the protective seal is situated in the area of the hollow part (121) of the piston (113) so that, on being displaced, the piston (113) opens its hollow part (121) in such a way as to bring the particles into the tube (104), and the protective seal (114) is intended to yield at above a threshold pressure in order to expel the particles.15. The needleless syringe as claimed in claim 10, characterized in that the thrust device is formed by a spring.16. The needleless syringe as claimed in claim 13, characterized in that the protective seal is situated in the area of the hollow part (121) of the piston (113) so that, on being displaced, the piston (113) opens its hollow part (121) in such a way as to bring the particles into the tube (104), and the protective seal (114) is intended to yield at above a threshold pressure in order to expel the particles.
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이 특허에 인용된 특허 (4)
Schwebel Paul R. (44045 15th St. West Lancaster CA 93534) Friend Manuel N. (311 Bruce La. Turlock CA 95380), Device for filling medicament injectors.
Sanford John C. (Geneva NY) Wolf Edward D. (Ithaca NY) Allen Nelson K. (Newfield NY), Method for transporting substances into living cells and tissues and apparatus therefor.
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