Patents by Inventor Egon Lesemann

Egon Lesemann 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).

  • Patent number: 5108380
    Abstract: A valve device for a hub member of a catheter or the like. An open cup-shaped hollow cylinder with a slit bottom portion is axially displaceable in the chamber of the housing of the hub member. In the closed position, a helical spring presses the edge of the opening of the hollow cylinder against the inner end of an insertion opening for a connecting member. The insertion opening is formed at the housing and has a diameter larger than the inner circumference of the edge of the opening of the hollow cylinder. The bottom portion is pulled into an adapted central hole of a closing ring fixed in the housing, through which hole the bottom portion may be pushed axially against the spring action for releasing its legs formed by the slit. Throughout this operation the resilient hollow cylinder is free of stresses, so that the edges of the slit in the bottom portion are not deformed.
    Type: Grant
    Filed: January 4, 1991
    Date of Patent: April 28, 1992
    Assignee: B. Braun Melsungen AG
    Inventors: Gerd Herlitze, Klaus-Joachim Schmidt, Egon Lesemann, Hans-Otto Maier, Karl-Friedrich Voges, Heinz G. Wiegel
  • Patent number: 4968308
    Abstract: A coupling assembly for connecting a flexible catheter to the hub cone of a sheath for inserting the catheter into a punctured body cavity consists of a housing having two separable housing halves which jointly form a passage for the catheter and have their patient-proximal front end provided with a tip for insertion into the hub cone of the sheath. In the passage, there is arranged shaped sealing formed as a hollow cylinder of an elastic material, provided as a tube tightly surrounding the catheter and having a thickened head portion. The outer diameter of the head portion is adapted to the outer diameter of the tip of the housing, and the tube is inserted into a widened portion of the passage such that the head portion of the tube abuts against the front face of the tip. Such a shaped sealing acts as a closing stopper which prevents that blood can travel rearward between the separating slits of the housing halves and escape to the outside.
    Type: Grant
    Filed: May 2, 1989
    Date of Patent: November 6, 1990
    Assignee: B. Braun Melsungen AG
    Inventors: Gerhard Herlitze, Klaus-Joachim Schmidt, Egon Lesemann, Hans-Otto Maier, Karl-Friedrich Voges, Heinz Wiegel