INJECTION DEVICES
First Claim
1. An autoinjector comprising:
- a body portion (12) for receiving in use a syringe or cartridge (60) having a bung slideably mounted therein for expelling a dose;
a drive mechanism (35, 22, 26, 28) including energy storage means (35) and adapted to be released from a cocked position to a fired position on actuation of a trigger (14), said mechanism when released being operable to drive the bung to expel a dose,characterised by a cocking arrangement (8, 30, 40) comprising an elongate flexible element (8) for being pulled to cock said drive mechanism.
1 Assignment
0 Petitions
Accused Products
Abstract
An autoinjector device comprises a drive housing 10 and a syringe housing 12 which can be disconnected to allow insertion of a syringe. A drive mechanism in the drive housing is cocked by means of a cord 8 connected between the drive housing and the syringe housing. The drive mechanism comprises a drive gear 22 rotatably mounted in the drive housing and acting as a rotary crank connected by a connecting rod 26 to a plunger 28. In use the drive gear 22 is driven by a torsion spring 35 so that the drive mechanism extends the syringe from the syringe housing and expels a dose and then retracts the syringe back into the housing. A firing button 14 releases the drive gear to be driven by the torsion spring but is also engageable as a brake on the rim of the drive gear.
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Citations
20 Claims
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1. An autoinjector comprising:
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a body portion (12) for receiving in use a syringe or cartridge (60) having a bung slideably mounted therein for expelling a dose; a drive mechanism (35, 22, 26, 28) including energy storage means (35) and adapted to be released from a cocked position to a fired position on actuation of a trigger (14), said mechanism when released being operable to drive the bung to expel a dose, characterised by a cocking arrangement (8, 30, 40) comprising an elongate flexible element (8) for being pulled to cock said drive mechanism. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 20)
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17. An autoinjector comprising:
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a body portion (10,12) for receiving in use a syringe or cartridge (60) having a bung slideably mounted therein for expelling a dose; a drive mechanism including energy storage means (35) and adapted to be released from a cocked position to a fired position on actuation of a trigger (14), said mechanism when released being operable to drive the bung to expel a dose, characterised in that said drive mechanism includes a rotary crank element (22) connected to a slideable drive plunger (28) by a connecting rod (26) in a crank-slider relationship, and said energy storage means (35) acts on said rotary crank element.
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18. An autoinjector comprising:
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a body portion (10, 12) for receiving in use a syringe or cartridge (60) having a bung slideably mounted therein for expelling a dose; a drive mechanism including energy storage means (35) and adapted to be released from a cocked position to a fired position on actuation of a trigger (14), said mechanism when released being operable to drive the bung to expel a dose, characterised in that said drive mechanism includes user operable means (14) for applying or modulating a braking force to control the speed of operation of said mechanism.
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19. A penetration depth adjustment arrangement for an injection device, said arrangement comprising:
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a housing (10, 12) having a forward end region through which the injection is effected; a depth adjustment element (20) disposed in said forward end region and for being placed against the injection site in use, and a depth adjustment mechanism for advancing and/or retracting said adjustment element incrementally relative to said housing upon manual actuation of a separate depth adjustment actuator (18).
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Specification