Automatic injection and retraction devices for use with pre-filled syringe cartridges
First Claim
1. An automatic injection and retraction device having a longitudinal axis, comprising:
- an injection assembly having an activation-prevention feature moveable between an on position and an off position;
a retraction assembly having a needle guard, said needle guard being removable from said retraction assembly in a direction along the longitudinal axis upon application of a removal force; and
a pre-filled syringe cartridge having a hypodermic needle with a needle sheath thereon, said retraction assembly being secured to said injection assembly so that said pre-filled syringe cartridge is disposed in said retraction assembly with said needle sheath secured to said needle guard,wherein said injection and retraction assemblies are configured so that, upon application of a twisting torque to said injection and retraction assemblies about the longitudinal axis, said activation-prevention feature is configured to move from said on position to said off position simultaneous with applying said removal force to said needle guard.
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0 Petitions
Accused Products
Abstract
An automatic injection and retraction device having a longitudinal axis is provided that includes an injection assembly, a retraction assembly, and a pre-filled syringe cartridge. The injection assembly has an activation-prevention feature moveable between an on position and an off position. The retraction assembly has a needle guard that is removable in a direction along the longitudinal axis upon application of a removal force. The pre-filled syringe cartridge has a hypodermic needle with a needle sheath thereon. The retraction and injection assemblies are secured to one another so that the pre-filled syringe cartridge is in the retraction assembly with the needle sheath secured to the needle guard. The retraction and injection assemblies are configured so that, upon application of a twisting torque to the injection and retraction assemblies, the activation-prevention feature moves from the on position to the off position simultaneous with applying the removal force to the needle guard.
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Citations
20 Claims
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1. An automatic injection and retraction device having a longitudinal axis, comprising:
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an injection assembly having an activation-prevention feature moveable between an on position and an off position; a retraction assembly having a needle guard, said needle guard being removable from said retraction assembly in a direction along the longitudinal axis upon application of a removal force; and a pre-filled syringe cartridge having a hypodermic needle with a needle sheath thereon, said retraction assembly being secured to said injection assembly so that said pre-filled syringe cartridge is disposed in said retraction assembly with said needle sheath secured to said needle guard, wherein said injection and retraction assemblies are configured so that, upon application of a twisting torque to said injection and retraction assemblies about the longitudinal axis, said activation-prevention feature is configured to move from said on position to said off position simultaneous with applying said removal force to said needle guard. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An automatic injection and retraction device having a longitudinal axis, comprising:
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an injection assembly having an activation sub-assembly and an injection sub-assembly, said activation sub-assembly being rotatable with respect said injection sub-assembly about the longitudinal axis but not moveable with respect to said injection sub-assembly along the longitudinal axis; a retraction assembly having a retraction sub-assembly and a needle guard, said needle guard being moveable with respect said retraction sub-assembly along the longitudinal axis but not rotatable with respect to said retraction sub-assembly along the longitudinal axis; and a pre-filled syringe cartridge having a hypodermic needle with a needle sheath thereon, said retraction assembly being secured to said injection assembly so that said pre-filled syringe cartridge is disposed in said retraction assembly with said needle sheath secured to said needle guard, wherein said needle guard having said needle sheath secured thereto is removed from said retraction sub-assembly in a direction along the longitudinal axis upon application of a twisting torque to said activation sub-assembly and said needle guard about the longitudinal axis. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of providing a parenteral injection of liquid medicament, comprising:
twisting an injection assembly with respect to a retraction assembly so that said injection assembly is simultaneously moved to an armed position and said retraction assembly is separated from a needle guard, said needle guard being engaged to a needle sheath so that separation of said needle guard from said retraction assembly removes said needle sheath from a hypodermic needle within said retraction assembly. - View Dependent Claims (19, 20)
Specification