Pen Needle Assembly For Preventing Under-Torquing and Over-Torquing Of Pen Needle
First Claim
Patent Images
1. A hub assembly for an injection apparatus, comprising:
- a cover having outer and inner surfaces;
a hub disposed in said cover and having first and second ends and outer and inner surfaces, an opening being formed at said first end and threads being formed on said inner surface proximal said second end to facilitate connecting said hub assembly to a cartridge of said injection apparatus;
a plurality of protrusions formed on said outer surface of said hub; and
at least one rib formed on said inner surface of said cover such that said at least one rib is disposed between adjacent protrusions when said hub is disposed in said cover;
wherein said at least one rib moves over said plurality of protrusions when said hub assembly is properly connected with the cartridge, thereby indicating to the user that said hub assembly and the cartridge are properly connected.
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Accused Products
Abstract
A pen needle hub and cover for a pen needle assembly that provides tactile and/or audible indicia of proper attachment between the hub of the pen needle and the pen is provided. Such indicia substantially prevent under- and over-torquing of the pen needle. The tactile indicia may include a user sensing a wave of a torque of peak value followed by a torque of lesser value.
89 Citations
21 Claims
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1. A hub assembly for an injection apparatus, comprising:
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a cover having outer and inner surfaces; a hub disposed in said cover and having first and second ends and outer and inner surfaces, an opening being formed at said first end and threads being formed on said inner surface proximal said second end to facilitate connecting said hub assembly to a cartridge of said injection apparatus; a plurality of protrusions formed on said outer surface of said hub; and at least one rib formed on said inner surface of said cover such that said at least one rib is disposed between adjacent protrusions when said hub is disposed in said cover; wherein said at least one rib moves over said plurality of protrusions when said hub assembly is properly connected with the cartridge, thereby indicating to the user that said hub assembly and the cartridge are properly connected. - View Dependent Claims (2, 3, 4, 5)
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6. A hub assembly for an injection apparatus, comprising:
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a cover having outer and inner surfaces; a hub disposed in said cover and having first and second ends and outer and inner surfaces, an opening being formed at said first end and threads being formed on said inner surface proximal said second end to facilitate connecting said hub assembly to a cartridge of said injection apparatus; at least one protrusion formed on said outer surface of said hub proximal said first end; at least one cut-out portion formed in said inner surface of said cover; and a cantilever hook formed in each of said at least one cut-out portions of said cover, said cantilever hook having an arm and a projection such that when said hub is disposed in said cover said at least one protrusion engages said arm of said at least one cantilever hook such that an interference fit is formed between said hub and said cover; wherein said at least one protrusion moves along said at least one cantilever hook when said hub assembly is being connected with the cartridge, and when said hub assembly is properly connected said at least one protrusion slides over said projection of said cantilever arm into said cut-out portion thereby indicating to the user that said hub assembly and cartridge are properly connected. - View Dependent Claims (7, 8, 9)
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10. A hub assembly for an injection apparatus, comprising:
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a cover; a hub disposed in said cover and having first and second ends and outer and inner surfaces, an opening being formed at said first end and threads being formed on said inner surface proximal said second end to facilitate connecting said hub assembly to a cartridge of said injection apparatus; and a ring assembly disposed inside said hub; wherein said ring assembly creates audible indicia with said threads when said hub assembly and the cartridge are properly connected. - View Dependent Claims (11, 12)
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13. A hub assembly for an injection apparatus, comprising:
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a cover having outer and inner surfaces; a hub disposed in said cover and having first and second ends and outer and inner surfaces, an opening being formed at said first end and threads being formed on said inner surface proximal said second end to facilitate connecting said hub assembly to a cartridge of said injection apparatus; a plurality of cavities formed in said inner surface of said cover; and at least one projection formed on said outer surface of said hub; wherein said plurality of cavities move over said at least one projection when said hub assembly is properly connected with the cartridge, thereby indicating to the user that said hub assembly and cartridge are properly connected. - View Dependent Claims (14, 15, 16)
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17. A hub assembly for an injection apparatus, comprising:
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a cover having outer and inner surfaces; a hub disposed in said cover and having a base and a side wall extending outwardly from said base, threads being formed on an inner surface of said side wall to facilitate connecting said hub assembly to a cartridge of said injection apparatus; a first projection formed on said inner surface of said side wall; and a second projection formed on an inner surface of said base, said second projection contacting said first projection; wherein said second projection is moved over said first projection by said cartridge when said hub assembly is properly connected with the cartridge, thereby creating audible indicia to the user that said hub assembly and the cartridge are properly connected.
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18. A hub assembly for an injection apparatus, comprising:
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a cover having outer and inner surfaces; a hub disposed in said cover and having a base and a side wall extending outwardly from said base, threads being formed on an inner surface of said side wall to facilitate connecting said hub assembly to a cartridge of said injection apparatus; a projection formed on said hub; and a membrane formed on said cover; wherein said projection punctures said membrane when said hub assembly is properly connected with the cartridge, thereby creating audible indicia to the user that said hub assembly and the cartridge are properly connected.
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19. A hub assembly for an injection apparatus, comprising:
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a cover having outer and inner surfaces; a hub disposed in said cover and having first and second ends and outer and inner surfaces, an opening being formed at said first end and threads being formed on said inner surface proximal said second end to facilitate connecting said hub assembly to a cartridge of said injection apparatus; and means for generating indicia when said hub assembly is properly connected with the cartridge, thereby indicating to the user that said hub assembly and the cartridge are properly connected. - View Dependent Claims (20, 21)
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Specification