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US 5,147,311 AGranted
Injection device for use with a deformable ampoule
OwnerEwald Pickhardinventor
Life of this patent
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Abstract
An injection device (1) has a housing (2) in which is arranged a holder for a deformable, medicament-containing ampoule (4). To a frontal end region is linked an injection needle (5) which communicates with the interior of the ampoule and with a driving device linked to the other frontal end region of the ampoule, opposite the frontal end region facing the injection needle. The ampoule (4) is arranged and held within a support device (13) that extends between both frontal end regions.
Claims29
An injection device for selectively dispensing a small, controlled amount of a medicament into a body of a patient, comprising
- (a) a deformable bag-shaped ampoule having a closed end and an opposite open dispensing end, the ampoule having a longitudinal axis and defining an interior chamber containing the medicament,
- (b) a coaxial support receiving the ampoule between the ends thereof,
- (c) a housing providing an abutment for the ampoule support,
- (d) a hypodermic needle,
- (e) a device for sealing the open ampoule end and for holding the hypodermic needle, the device comprising
- (1) a holding element fixedly held in the support,
- (1) a carrier for the hypodermic needle, the carrier being mounted on the holding element for axial adjustment relative thereto, and
- (2) a piercing device penetrating through the holding element into the interior ampoule chamber upon axial adjustment of the hypodermic needle carrier, the piercing device having an axial bore receiving medicament from the interior ampoule chamber upon penetration thereof by the piercing device,
- (f) an actuating mechanism for compressing the deformable ampoule and extending into the housing, the actuating mechanism comprising
- (1) a piston slidable in an axial direction towards the sealing and holding device, the piston acting upon the closed ampoule end for compressing the deformable ampoule,
- (2) the support having a guide track extending between the ampoule ends and being arranged for guiding the slidable piston, and
- (g) a constricted, pressure-regulating channel extending through the hypodermic needle carrier, the channel connecting the interior ampoule chamber to the hypodermic needle through the bore of the piercing device.
9 more elements
Dependencies are inferred from the claim text.