Patents by Inventor Ralf Thomas NAWROTH

Ralf Thomas NAWROTH 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).

  • Hollow filter element and filter device for filtering air
    Patent number: 11400403
    Abstract: A hollow filter element for inserting into a filter device for filtering air, in particular of an internal combustion engine of a motor vehicle, includes a filter material which is held on the end face by a planar surround in a sealed manner. The planar surround has at least one grip recess for handling the hollow filter element. A filter device having such a hollow filter element includes a housing having a housing base part and a housing cover. The housing cover has at least one pin which, upon correct installation of the hollow filter element in the housing base part and when the housing cover is placed on the housing base part, projects into the grip recess of the planar surround.
    Type: Grant
    Filed: April 10, 2018
    Date of Patent: August 2, 2022
    Assignee: Daimler AG
    Inventors: Thomas Meffert, Ralf Thomas Nawroth
  • Hollow Filter Element and Filter Device for Filtering Air
    Publication number: 20200054981
    Abstract: A hollow filter element for inserting into a filter device for filtering air, in particular of an internal combustion engine of a motor vehicle, includes a filter material which is held on the end face by a planar surround in a sealed manner. The planar surround has at least one grip recess for handling the hollow filter element. A filter device having such a hollow filter element includes a housing having a housing base part and a housing cover. The housing cover has at least one pin which, upon correct installation of the hollow filter element in the housing base part and when the housing cover is placed on the housing base part, projects into the grip recess of the planar surround.
    Type: Application
    Filed: April 10, 2018
    Publication date: February 20, 2020
    Applicant: Daimler AG
    Inventors: Thomas MEFFERT, Ralf Thomas NAWROTH