US Patent 7597705 Vascular puncture seal anchor nest

The present invention provides a method and apparatus for sealing a subcutaneous tissue puncture. The method and apparatus increases the reliability of device function by creating a multi-level anchor nest in a carrier tube of a tissue puncture closure device. The multi-level nest allows an insertion sheath or other deployment member to slide between the carrier tube and the anchor to rotate and deploy the anchor within an artery or other lumen.