Auto-injectors for administration of a medicament within a prefilled syringe
First Claim
1. An apparatus, comprising:
- a housing defining a gas chamber, a side wall of the housing defining an opening configured to selectively place the gas chamber in fluid communication with an exterior volume;
a carrier configured to be movably disposed within the housing, the carrier configured to be coupled to a medicament container, a proximal surface of the carrier defining a portion of a boundary of the gas chamber; and
an expandable assembly having a first member and a second member, the first member coupled to an elastomeric member disposed within the medicament container, the second member including a valve portion, the expandable assembly configured to transition from a collapsed configuration to an expanded configuration when the elastomeric member moves within the medicament container, the valve portion configured to move relative to the opening when the expandable assembly transitions from the collapsed configuration to the expanded configuration to place the gas chamber in fluid communication with the exterior volume.
2 Assignments
0 Petitions
Accused Products
Abstract
An apparatus includes a housing, a carrier, and an expandable assembly. The housing defines an opening configured to selectively place a gas chamber of the housing in fluid communication with an exterior volume. The carrier is movably disposed within the housing and is coupled to a medicament container. A proximal surface of the carrier defines a portion of a boundary of the gas chamber. The expandable assembly has a first member and a second member. The first member is coupled to an elastomeric member disposed within the medicament container, and the second member includes a valve portion. The expandable assembly transitions from a collapsed configuration to an expanded configuration when the elastomeric member moves within the medicament container. The valve portion moves relative to the opening when the expandable assembly transitions from the first to the second configuration, placing the gas chamber in fluid communication with the exterior volume.
602 Citations
20 Claims
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1. An apparatus, comprising:
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a housing defining a gas chamber, a side wall of the housing defining an opening configured to selectively place the gas chamber in fluid communication with an exterior volume; a carrier configured to be movably disposed within the housing, the carrier configured to be coupled to a medicament container, a proximal surface of the carrier defining a portion of a boundary of the gas chamber; and an expandable assembly having a first member and a second member, the first member coupled to an elastomeric member disposed within the medicament container, the second member including a valve portion, the expandable assembly configured to transition from a collapsed configuration to an expanded configuration when the elastomeric member moves within the medicament container, the valve portion configured to move relative to the opening when the expandable assembly transitions from the collapsed configuration to the expanded configuration to place the gas chamber in fluid communication with the exterior volume. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus, comprising:
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a housing defining a gas chamber; an energy storage member disposed within the housing, the energy storage member configured to produce a pressurized gas within the gas chamber; a medicament container assembly disposed within the housing, the medicament container assembly including a container body and an elastomeric member disposed within the container body, the medicament container assembly including a needle coupled to a distal end portion of the container body; and a carrier coupled to the medicament container assembly, a proximal surface of the carrier defining a portion of a boundary of the gas chamber, the carrier configured to move within the housing from a first carrier position to a second carrier position in response to a force exerted by the pressurized gas on the proximal surface of the carrier, the carrier including a first seal member and a second seal member, the first seal member in sliding contact with an inner surface of the housing to fluidically isolate the gas chamber, the second seal member in contact with a proximal end portion of the container body, the first seal member in a fixed position relative to the second seal member. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification