Cilag International Gmbh

Rosemary Louise Habeshaw

Nigel D Harrison

Jonathan Hogwood

Tim Barrow-Williams

Matthew James Brady

David Johnston

Gregory Berman

David Maxwell Johnston

The present invention concerns an injection device with a housing adapted to receive a syringe having a discharge nozzle, the housing having an indicator opening. There is a trigger and a forward drive arranged to act upon the syringe on actuation of the trigger to advance the syringe from a retracted position to an extended position thereby discharging the contents of the syringe through the discharge nozzle. A support member is in contacting juxtaposition with the housing and a return drive is supported by the support member and arranged to act upon the syringe after the contents of the syringe has been discharged so that the syringe can be withdrawn from the extended position to the retracted position. Advantageously, the support member is arranged in the housing so that the second drive does not obscure an inspection of the contents of the syringe through the indicator opening. Hence, it can be clearly determined whether the contents of the syringe have been expelled from the syringe.

Injection device

A syringe is received within a housing, the syringe having a bore terminating at a forward end in a hypodermic needle and at a rearward end in a flared opening in which a bung having a bore surrounded by a skirt is insertod. A drive element has a forward end consisting of a substantially flat annular region that bears upon the skirt of the bung and surrounds a conical middle region that is received in the bore of the bung. An actuator advances the drive element so as to advance the bung and discharge the contents through the needle. The opening in the rear of the synnge is flared by being provided with a radius. The combination of the radius at the opening and the projecting conical middle region of the drive element allows misalignments of the two to be managed during automated assembly.

An injection device () is provided which includes a syringe () having a discharge nozzle (). The syringe is movable between a retracted position in which the discharge nozzle is contained within the housing and an extended position in which the discharge nozzle extends from the housing. A trigger () is activatable to allow the contents of the syringe to be discharged through the discharge nozzle. There is also a releasable locking mechanism () which, when engaged, prevents the trigger from moving into an active position. The trigger includes a first portion () having a cut-out () which extends from a first end of the trigger in a direction substantially parallel to the first axis (). The releasable locking mechanism includes a protrusion () along a second axis () for communicating with the first portion of the trigger when the releasable locking mechanism is engaged and for communicating with the cut-out when the releasable locking mechanism is disengaged. Such an injection device provides improved protection against accidental activation of the trigger.

An injection deviceis described having a housingthat receives a syringe. The syringeis biased by a return springfrom an extended position in which the needleextends from the housingthrough an exit apertureto a retracted position in which it does not. A drive springacts via a drive to advance the syringefrom its retracted position to its extended position and discharge its contents through the needleand a return spring, brought into play when the drive has reached a nominal return position, restores the syringeto its retracted position. A releasable locking mechanism retains the syringein its retracted position. A sleeveprojects from the exit apertureand can be depressed to release the locking mechanism. A triggerhas a rest position, in which it engages the drive, retaining it in a position corresponding to the retracted position of the syringe, and a depressed position, in which it no longer causes the drive to be so retained. The sleevenormally locks the triggerin its rest position. However, depression of the sleeveinto the exit aperture, allows the trigger to be depressed. Thereafter, the triggeris retained in its active position.

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Blinco Grove, United Kingdom

Rosemary Louise Habeshaw