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Flexible member for resisting retrograde flow

  • US 10,238,791 B2
  • Filed: 01/05/2016
  • Issued: 03/26/2019
  • Est. Priority Date: 01/05/2015
  • Status: Active Grant
First Claim
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1. A device configured for insertion in a lumen, said device comprising:

  • (a) an outer elongated member,(b) an inner elongated member disposed within the outer elongated member and axially movable with respect to the outer elongated member,(c) a stop member disposed about the inner elongated member and axially movable with respect to the outer elongated member, and(d) a flexible structure having a distal portion attached to the stop member and a proximal portion attached to the outer elongated member and configured such that when the inner elongated member is extended distally relative to the outer elongated member, the flexible structure adopts a reduced width profile and such that when the inner elongated member is retracted proximally relative to the outer elongated member to a point of maximal retraction, the flexible structure adopts an expanded width profile with a first frustum having a first frustum angle substantially within a second frustum having a second frustum angle that is smaller than the first frustum angle, the expanded width profile being more resistant to deformation due to fluid pressure in a proximal direction than it is to deformation due to fluid pressure in a distal direction.

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