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Delivery system with variable delivery rate for deploying a medical device

  • US 7,976,574 B2
  • Filed: 08/08/2008
  • Issued: 07/12/2011
  • Est. Priority Date: 08/08/2008
  • Status: Expired due to Fees
First Claim
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1. A system for delivering a medical device within vasculature, comprising:

  • a retractable sheath;

    a medical device retained by the retractable sheath; and

    a handle assembly including an actuating mechanism coupled to the sheath, the actuating mechanism including a flexible elongate member having one end coupled to the retractable sheath and another end coupled to a wind-up member, the wind-up member being rotatable to allow a portion of the flexible elongate member to wind thereon to effect longitudinal movement of the sheath, and a speed-increasing member associated with the actuating mechanism which increases the speed by which the sheath moves longitudinally as the flexible elongate member is wound about the wind-up member, wherein the wind-up member is a drum and the speed-increasing member is a first cam directly and pivotally connected to the drum and a second cam directly linked to the first cam.

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