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Drug Delivery Device Inner Housing Having Helical Spline

  • US 20120172809A1
  • Filed: 11/14/2011
  • Published: 07/05/2012
  • Est. Priority Date: 06/01/2009
  • Status: Active Grant
First Claim
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1. A drug delivery device comprising:

  • a housing,a number sleeve,a button,a spindle not rotating during dose setting and rotating during injection,a driver engaged with the spindle via a groove,whereinthe driver follows a helical path when setting a dose and a helical path in an opposite direction when delivering the dose.

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