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Medicament delivery device

  • US 7,695,456 B2
  • Filed: 01/22/2003
  • Issued: 04/13/2010
  • Est. Priority Date: 01/25/2002
  • Status: Active Grant
First Claim
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1. A lead screw for a medicament delivery device, comprising:

  • a shaft portion; and

    a head portion, the head portion further comprising;

    a fixed part,a displaceable part movable with respect to the fixed part,biasing means acting normally to urge the displaceable part away from the fixed part, anda position sensor to detect when the displaceable part moves towards the fixed part, in which one of the fixed is provided with a plurality of resilient fingers extending axially with respect to a longitudinal axis of the lead screw, and displaceable part is provided with a plurality of openings, each of the resilient fingers extending within a corresponding opening.

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