Patents by Inventor Josef Jansen

Josef Jansen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20040015233
    Abstract: The invention relates to a cardiac valve prosthesis, comprising a support housing with at least two flaps, especially to a mitral cardiac valve. The flaps and/or the support housing have a core and a surface layer enclosing said core, the core material being characterized by a greater hardness and/or lesser flexural elasticity than the surface layer. For producing the cardiac valve according to the invention the inner surface layers of the flaps and the support body are produced as an integral part by at least one dip-coating step in a liquid solution. A support body core is then injection-molded onto said structure. In further dip-coating steps the flap core zones are formed and the outer surface layers of the flaps and the support body are finally produced in at least one further dip-coating step and the body so produced is then removed from the dip mold.
    Type: Application
    Filed: April 2, 2003
    Publication date: January 22, 2004
    Inventor: Josef Jansen
  • Publication number: 20030187500
    Abstract: The invention relates to a conduit cardiac-valve prosthesis. Said prosthesis consists of a cylindrical tube or a tube provided with bulbous projections with an integrated support housing comprising a base ring, which bears at least two stanchions that are orientated substantially in the direction of the ring axis and are connected by an arc-shaped wall that fixes flexible leaflets. The invention aims to improve the physiological properties of said prosthesis. To achieve this, the tube, the support housing and the leaflets consist of a single material, preferably polyurethane or another polymer and form a one-piece body.
    Type: Application
    Filed: February 28, 2003
    Publication date: October 2, 2003
    Inventors: Josef Jansen, Rudolf F J Meess, Sebastien Willeke, Oliver Haller, Christoph Classen
  • Publication number: 20030183982
    Abstract: The invention relates to a method for producing thin membrane-type structural components, especially flaps for cardiac valves, or for producing a multilayer membrane or a thin surface coating on the basis of a polymer, wherein the individual layers are produced on a base body while forming a solid link with said base body or the membrane-type structural components are applied to a support tool and the membrane-type structural components are then detached (separated) therefrom. The aim of the invention is to achieve a defined thickness distribution of the thin membranes or films. To this end, individual droplets of a polymer solution or droplets from viscous polymerizing multicomponent systems are applied to the base or the support tool in a punctiform manner, linearly in one row, in a caterpillar shape or across the surface of the based body or the support tool.
    Type: Application
    Filed: March 4, 2003
    Publication date: October 2, 2003
    Inventors: Josef Jansen, Rudolf F.J. Meess, Sebastian Willeke
  • Patent number: 6528006
    Abstract: The invention relates to a method of producing plastic film having a predefinable outline and/or even or uneven thickness, by machining preformed plastic film for separation and/or ablation. The method is used especially for producing flexible flaps for artificial heart valves. To produce a film having local variations in thickness and smooth edges where the piece of film has been cut, the invention provides for the plastic film to be separated and/or for specific areas to be ablated to the desired thickness by means of a laser beam.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: March 4, 2003
    Assignee: Adiam Life Science AG
    Inventor: Josef Jansen
  • Patent number: 6113631
    Abstract: A mitral valve prosthesis consists of a support housing (stent) with a base ring that bears at least two stays which substantially extend in the ring axis direction and are connected by curved wall for securing two flexible cusps. In order to obtain as uniform and reduced forces as possible between the cusps and the support housing, the connection lines between the cusps (21 to 23) and the top inner edge (241) of the wall (24) lie each in a plane.
    Type: Grant
    Filed: November 10, 1998
    Date of Patent: September 5, 2000
    Assignee: Adiam Medizintechnik GmbH & Co. KG
    Inventor: Josef Jansen
  • Patent number: 6086612
    Abstract: A mitral valve prosthesis consists of a support housing with a large base ring that bears two stays which substantially extend in the ring axis direction and are connected by curved walls for securing two flexible cusps. The free ends of the stays form an inner support for the cusps. In order to avoid a possible mutual interference between the heart and valve functions, the base-ring (12) has in the top view a closed, non-round shape with a common longitudinal axis (15) but two transverse half-axis (16, 17) of different sizes. The stays (18, 19) lie on the longitudinal axis (15) and form the transition between the two halves of the valve. The less curved wall (13) carries a mural cusp (11) having a smaller surface and a higher angle of inclination relative to the base ring base surface than the more curved wall (14).
    Type: Grant
    Filed: November 17, 1998
    Date of Patent: July 11, 2000
    Assignee: Adiam Medizintechnik GmbH & Co. KG
    Inventor: Josef Jansen
  • Patent number: 5800527
    Abstract: A support housing (1) for valve and closure members, in particular for heart valve prostheses, has a base ring (2) which carries at least two symmetrically offset posts (4/5) substantially oriented in the direction of the ring axis and linked together by curved strips (3) for securing at least two flexible webs (6/7). In order to produce with such a support housing a valve or closure member, in particular a heart valve prosthesis, which operates reliably even with different closing pressure differentials, i.e. in particular even under varying physiological stress conditions, the stent (1) is only retained in sections and with limited flexibility. For that purpose the free ends (4) of the posts have a rigid form, and/or the bases of the posts have a flexibility limited by stops, and/or the strips (3) have a flexibility limited by stops.
    Type: Grant
    Filed: January 6, 1996
    Date of Patent: September 1, 1998
    Assignee: Adiam Medizintechnik GmbH & Co. KG
    Inventors: Josef Jansen, Ulrich Jansen
  • Patent number: 5376113
    Abstract: A method of producing flexible closing members, especially artificial heart valves, and a flexible closing member, especially an artificial heart valve, which can be produced according to such a method. According to the method of producing the housing of the closing member is radially expanded, the closing element of the closing member is formed as substantially plane two-dimensional element, and the plane two-dimensional element is connected to the housing in the expanded condition of the same. This method is preferably realized as dip method according to which the closing element is shaped and formed to the housing in a single working step. The described flexible closing member is an artificial three-sail heart valve which is characterized by a special shape of the three closing elements.
    Type: Grant
    Filed: December 21, 1993
    Date of Patent: December 27, 1994
    Inventors: Josef Jansen, Helmut Reul, Gunter Rau
  • Patent number: 5116564
    Abstract: A method of producing flexible closing members, especially artificial heart valves, and a flexible closing member, especially an artificial heart valve, which can be produced according to such a method. According to the method of producing the housing of the closing member is radially expanded, the closing element of the closing member is formed as substantially plane two-dimensional element, and the plane two-dimensional element is connected to the housing in the expanded condition of the same. This method is preferably realized as dip method according to which the closing element is shaped and formed to the housing in a single working step. The described flexible closing member is an artificial three-sail heart valve which is characterized by a special shape of the three closing elements.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: May 26, 1992
    Inventors: Josef Jansen, Helmut Reul, Gunter Rau