AUTOINJECTION DEVICES
First Claim
Patent Images
1. An autoinjection device comprising:
- a housing including a main body portion and a front body portion moveable longitudinally between a closed position and an open position allowing access to enable in use a syringe to be loaded into said housing, the syringe having a body, a plunger and a needle at a forward end of the body;
a drive member and a drive bias means disposed in said housing, the drive member being moveable against said drive bias means to a primed position and operable in use when released from said primed position to urge the syringe forwardly to an injection position, and to expel a dose therefrom;
trigger means for releasably retaining said drive member in its primed position;
the device being operable to move said drive member to its primed position as the main body and the front housing portion are moved to their closed position.
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Accused Products
Abstract
An autoinjection device includes a main body 12 in the front end of which is slideably mounted a drawer or front body portion 14. The drawer can be opened to remove or insert a syringe. Closing the drawer whilst pressing a multifunction button 22 primes the drive mechanism 54, 58 by latching it against trigger latch 66. Pressing the button 22 again whilst urging the front end causes the drawer to release the trigger latch 66. After the injection the drawer shrouds the used needle and can be released only by pressing the button 22.
57 Citations
33 Claims
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1. An autoinjection device comprising:
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a housing including a main body portion and a front body portion moveable longitudinally between a closed position and an open position allowing access to enable in use a syringe to be loaded into said housing, the syringe having a body, a plunger and a needle at a forward end of the body; a drive member and a drive bias means disposed in said housing, the drive member being moveable against said drive bias means to a primed position and operable in use when released from said primed position to urge the syringe forwardly to an injection position, and to expel a dose therefrom; trigger means for releasably retaining said drive member in its primed position; the device being operable to move said drive member to its primed position as the main body and the front housing portion are moved to their closed position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 26, 27, 28, 29)
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17. An autoinjection device comprising:
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a housing having a main body portion, containing a drive mechanism, and a front body portion moveable longitudinally between a closed position and an open position allowing access to enable a syringe to be loaded therein for an autoinjection cycle, wherein closing of said housing is operable to energise the drive mechanism for the autoinjection cycle, and rearward movement beyond the closed position releases said drive mechanism. - View Dependent Claims (18)
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19. An injection device comprising:
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a housing including a main body portion and a front body portion relatively moveable longitudinally; the housing being openable to provide access to allow a syringe to be loaded into the housing in use, the syringe having a body, a plunger and a needle at its forward end; a drive member disposed within the housing and moveable against a drive spring bias to a primed position and operable in use when released from said primed position to urge the syringe forwardly within the housing to an injection position in which the syringe needle projects from the front end of the housing and to expel a dose therefrom; a trigger for latching said drive member in its primed position; said front body portion further being moveable against a housing spring bias rearwardly from a closed position to a fire position in which it unlatches said firing latch to free said drive member for forward movement under the influence of said drive spring bias; wherein as said housing is moved away from the injection site following an injection, said housing spring bias urges said front body portion forwardly back towards its closed position to shroud said needle; a releasable safety latch preventing rearward movement of said front body portion from its closed position until release of the safety latch, and a latch for latching said forward body portion in its extended, shrouding, position. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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30. An injection device comprising:
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a housing; said housing being adapted in use to receive a syringe having a needle at its forward end; a drive member moveable against a spring bias to a primed position and releasable in use to urge said syringe to a forward position and to expel a dose; a trigger for latching said drive member in its primed position; an actuating member having a shroud portion at a forward region thereof and moveable between a forward position and a rearward position; actuating member bias means biasing said actuating member towards its forward position; said actuating member being adapted in use when moved to its rearward position to release said firing latch to free said drive member for movement; the actuating member thereafter being movable forward under the influence of said actuating member bias means to return to its forward position with said shrouding region in use shrouding the needle when the needle is at its forward position, and releasable latch means for locking said shroud member against movement from its forward position.
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- 31. An injection device comprising a needle through which a dose is delivered and, adjacent said needle, a skin contact surface, said skin contacting surface comprising two lobes spaced to either side of the longitudinal axis of the needle and, adapted in use, when the contact element is pressed against the skin, to compress the flesh space locations to cause a bulge at the injection site.
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33. An autoinjection device comprising a housing for receiving a syringe, and having a drive mechanism releasable to urge the syringe forwardly to an injection position and to expel a dose therefrom, said drive mechanism comprising a drive member mounted for sliding movement within said housing and acted upon by two constant force spring arrangements.
Specification