Owen Mumford Limited

Tahir Shabudin

Matthew David Farmer

Oliver Gould

Matthew John Dobson

Toby Cowe

Andrew Hung

Abiodun Falodi

Timothy Muller

Oliver Gareth Hyde

Kuiwei Zhang

Robert Hall

Parshia Moghadas

Callum Davies

Disclosed is an auto-injection apparatus for receiving a syringe, including: an outer casing enclosing a drive assembly and a syringe carrier configured to hold a barrel of the syringe, the syringe carrier being forward of the drive assembly and having stowed and delivery positions; an interlock extending between the syringe carrier and a syringe carrier housing at least partially surrounding the syringe carrier, the interlock preventing forward motion of the syringe carrier under the influence of an insertion actuator whilst in the stowed position. The drive assembly includes the insertion actuator for inserting a needle of the syringe into an injection site and a delivery actuator for driving a plunger into a barrel of the syringe which contains a substance for injection. The syringe carrier includes an interlock release mechanism which is configured to release the interlock such that the insertion actuator drives the syringe carrier forward.

Injection apparatus

An injection device is disclosed comprising a plunger for expressing medicament from a syringe and a delivery mechanism arranged in use to provide a forward biasing force to urge the plunger from a first rearward position to a second forward position to express a dose from the syringe. A latch arrangement is provided that releasably holds the plunger against the force of the delivery mechanism. The latch arrangement comprising at least two resilient segments which define opposing sections of an aperture within which a rearward end of the plunger is retained in the rearward position. A trigger is provided for releasing the plunger in use, the trigger being arranged to outwardly deflect at least one of the resilient segments such that the aperture is expanded to release the rearward end of the plunger. A method of manufacturing the injection device is also enclosed.

Injection device with safe trigger function

Injector

An autoinjector includes: an insertion spring between a housing and plunger assembly; a syringe driver; a second release mechanism releasing the plunger assembly from the housing, causing the insertion spring to move the plunger assembly through the housing with a syringe driver; a stop limiting movement of the syringe driver in the housing; and a third release mechanism releasing the plunger assembly from the syringe driver upon engagement with the stop, allowing the plunger assembly to continue through the housing. The first release mechanism releases the plunger from the delivery spring housing upon contact between the plunger assembly and a bung, causing the delivery spring to separate the delivery spring housing and the plunger, applying a delivery force to a bung. A latch mechanism latches the delivery spring housing at a forward position, preventing rearward movement of the delivery spring housing following release of the plunger.

Injection device with gap reduction mechanism

An injection device for delivering a dose of medicament from a syringe (), the injection device comprising a housing (), a plunger () moveably mounted within the housing (), an actuation mechanism (), a trigger mechanism (), and a plunger velocity regulator. The actuation (mechanism () is arranged to provide a forward biasing force to urge the plunger () forward in use to express a dose of medicament, and the trigger mechanism () is arranged to releasably hold the plunger () against the force of the actuation mechanism (). The plunger velocity regulator comprises a cam surface () associated with the housing, and a cam member () associated with the plunger () and arranged to engage the cam surface () during actuation movement of the plunger () such that axial movement of the plunger () relative to the housing () causes relative rotational movement of the cam member () which limits the forward velocity of the plunger movement. The plunger () is axially connected to the cam member () by a releasable coupling (), and the plunger velocity regulator further comprises a coupling member () which blocks release of the releasable coupling () when the plunger () is in a rearward position and wherein forward movement of the plunger () moves the releasable coupling () out of engagement with the coupling member () such that the plunger () may disengage the cam member () after an initial movement of the plunger ().

Injection device

Syringe

An injection device () for the delivery of medicament has an indicator () for providing an end of dose indication. The device comprises a housing (), an extendable plunger (), an actuation mechanism (), a trigger arrangement (), and an indicator (). The extendable plunger () comprises a leading portion () and a trailing portion () configured to allow the plunger () to extend from an initial length to a maximum extended length, the plunger portions ((),) being slidably mounted within the housing (). The actuation mechanism () is configured to move the leading portion () of the plunger () forwardly relative to a syringe () so as to express medicament from the syringe (). The trigger arrangement () is moveable in use to release the actuation mechanism (). The indicator () is responsive to the forward movement of the plunger () and is configured to provide an audible and/or tactile and/or visual indication of the end of dose when the plunger () reaches or approaches its forwardmost position.

Injection devices

The invention relates to an injection device comprising an elongate housing and a cap removably mounted over a forward end of the housing. The cap comprising at least one slot extending forwardly from its rear edge; the at least one slot being configured to engage with an outwardly projecting protrusion on an outer surface of the housing when the cap is mounted on the housing. A rearward portion of the cap includes rearwardly extending engagement features provided on each side of the at least one slot, the engagement features being configured to locate within a cavity in the housing when the cap is mounted on the housing. The cavity is provided with corresponding surfaces which align with the cap engagement features so as to hold the outwardly projecting protrusion within the cut-out.

Growing community of inventors

Oxford, United Kingdom

Tahir Shabudin