Patents by Inventor Ernst Schulte

Ernst Schulte 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).

  • Door closer
    Patent number: 6434788
    Abstract: The invention describes a door closer with an energy storage that includes a resisting spring (3), with a closer shaft (1) driven by the resisting spring (3) and with an hydraulic fluid damped damping device (12, 13), whereby the energy storage and the damping device (12, 13) act upon a common closer shaft (1), whereby the resisting spring (3) and the closer shaft (1) are not in contact with the fluid of the damping device (12, 13). In this way a particularly slim housing is possible.
    Type: Grant
    Filed: July 14, 1999
    Date of Patent: August 20, 2002
    Inventor: Ernst Schulte
  • Automatic door closing device
    Patent number: 5090089
    Abstract: To simplify the fabrication of the housing of an automatic door closing device with hydraulic damping, it is proposed to configure the housing as a tubular hollow cylinder 106 on which, externally, by means of one or more compactly superimposed covering elements 102, a bypass valve 121 is formed.
    Type: Grant
    Filed: November 22, 1989
    Date of Patent: February 25, 1992
    Assignee: ECO Schulte GmbH & Co. KG
    Inventors: Ernst Schulte, Werner Korling, Franz Kraft
  • Process for obtaining enantiomers of 2-arylpropionic acids
    Patent number: 4973745
    Abstract: A process for obtaining enantiomers of 2-arylpropionic acids by reacting a racemic mixture thereof with an amine-enantiomer, which process comprises converting the racemate of the 2-arylpropionic acid with an optically active form of threo-1-p-nitrophenyl-2-aminopropane-1,3-diol into the diastereomeric salts, separating these salts and converting the thus-obtained pure diastereomers into the free acids of the enantiomer forms of the 2-arylpropionic acid or into the salts thereof.
    Type: Grant
    Filed: May 1, 1989
    Date of Patent: November 27, 1990
    Assignee: Medice Chem.-Pharm. Fabrik Putter GmbH & Co. KG
    Inventors: Gottfried Blaschke, Karl-Ernst Schulte