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US 2011/0034879 A1Published application
Automatic Injection Mechanism with Frontal Buttress
AssigneeWest Pharmaceutical Services, Inc.
InventorDoug Owen Crow
Life of this patent
Estimating the term…
Abstract
The present invention provides for an autoinjector that registers off a distal end of a syringe to provide for a more accurate needle insertion depth. The autoinjector employs an automatically deployable frontal buttress for registration of the distal end or shoulder of the syringe.
Claims20
An autoinjector comprising:
- a housing;
- a frontal buttress connected to a distal end of the housing;
- a syringe housed within the housing, the syringe including a barrel having a shoulder about a distal end of the barrel;
- and
- an injection assembly operatively connected to the syringe and configured to bias the syringe from an initial position in which the syringe is shrouded by the housing to an extended position in which a portion of the syringe extends beyond the housing,
- wherein the frontal buttress is configured to move from a first open position when the syringe is in the initial position to a second closed position to engage the shoulder of the syringe when the syringe is in the extended position.
3 more elements
An autoinjector comprising:
- a housing having a distal end;
- a syringe supporting a needle, the syringe having a shoulder proximate the needle;
- a needle shield for covering the needle;
- a drive mechanism to move the syringe between a first position wherein the needle is retracted within the housing and a second position wherein the needle is extended outside the housing;
- and
- a buttress member having a plurality of flexible members, each flexible member movable between a first radial orientation and a second radial orientation;
- and
- wherein with the syringe in the first position and the flexible members in the first radial orientation, at least a portion of the needle shield fits within the flexible members and with the syringe in the second position and the flexible members in the second radial orientation, the flexible members engage the shoulder.
5 more elements
Dependencies are inferred from the claim text.