×

Magnetic system for use in sealing body openings

  • US 4,258,705 A
  • Filed: 09/15/1978
  • Issued: 03/31/1981
  • Est. Priority Date: 09/15/1978
  • Status: Expired due to Term
First Claim
Patent Images

1. A sealing device for artificial and natural intestinal and artificial urethra ducts comprising (a) a ring-shaped, axially magnetized magnet member with north pole and south pole and adapted to be implanted in the tissue surrounding the duct near its outlet opening and with its axis substantially coaxial with the axis of the duct, and (b) a sealing member moveable between an inactive position outside the duct and a use position inside the duct near its outlet opening, substantially coaxial with the duct and with part of the sealing member within the implanted ring-shaped magnet member, said sealing member comprising a rod-shaped center magnet member and a sealing material surrounding the center magnet member and adapted to be in sealing contact in use position with the inner wall of the duct, wherein the rod-shaped center magnet member comprises at least two longitudinally aligned individual magnets arranged at a distance from each other and separated by a magnetically inert space, the poles of both magnets being oriented in use position in the same north-south direction as the poles of the ring-shaped implanted magnet member, the magnetically inert space between the two magnets of the center magnet member in use position being positioned within the implanted ring-shaped magnet member and substantially perpendicular to the plane of the implanted ring-shaped magnet member and substantially central with respect thereto, the poles of the individual magnets of the center magnet member being oriented in the use position relative the orientation of the poles of the implanted ring-shaped magnet member so that magnetic forces exerted by the magnets resisting attempts to push the center magnet member from use position farther into the duct are larger than those resisting attempts to pull it from use position out of the duct, said longitudinally aligned magnets acting together in use position so as to resist any axial displacement, the individual magnets of the rod-shaped magnet member being positioned in use position so as to resist tilting of the axis of the rod-shaped center magnet member relative the axis of the implanted ring-shaped magnet member.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×