Patents by Inventor Günter Gollnick

Günter Gollnick 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 and method of producing a door closer
    Patent number: 6618899
    Abstract: A door closer assembly and method of making the assembly, in which the closing force is exerted by at least one closing spring. The door closer assembly comprises a housing, a rotor journalled in said housing to deliver torque, and at least one piston apparatus, wherein said housing, said rotor, and said at least one piston apparatus are comprised of the same material of construction and exhibit at least substantially the same thermal expansion coefficient.
    Type: Grant
    Filed: August 11, 2000
    Date of Patent: September 16, 2003
    Assignee: Dorma GmbH + Co. KG
    Inventors: Lothar Ginzel, Horst Tillmann, Günter Gollnick