Patents by Inventor Erich Stephen

Erich Stephen 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).

  • Drive nut assembly for a door operator
    Patent number: 6718694
    Abstract: The present invention teaches a powered door operator for passenger transit vehicles having a drive nut assembly engaging a door hanger bracket substantially connected to a door disposed within an aperture of the vehicle structure. Such drive nut further engaging a drive screw to move a door for covering and uncovering an aperture for ingress and egress of passengers in a wall of a transit vehicle upon rotation of the drive screw enabled by a rotary prime mover. The drive assembly comprises a housing having an internal cavity, at least one drive nut insert having a helix portion substantially identical to the drive screw helix and disposed within said internal cavity, and a retaining clip engaging said at least one drive nut insert for substantial retainment thereof. Retaining clip further provides for simple replacement of such at least one drive nut insert during maintenance cycles thereby substantially eliminating periodic lubrication generally employed with powered door operators of the prior art.
    Type: Grant
    Filed: April 23, 2002
    Date of Patent: April 13, 2004
    Assignee: Westinghouse Air Brake Technologies Corporation
    Inventors: Andre Stojc, Erich Stephen
  • Drive nut assembly for a door operator
    Publication number: 20020194783
    Abstract: The present invention teaches a powered door operator for passenger transit vehicles having a drive nut assembly engaging a door hanger bracket substantially connected to a door disposed within an aperture of the vehicle structure. Such drive nut further engaging a drive screw to move a door for covering and uncovering an aperture for ingress and egress of passengers in a wall of a transit vehicle upon rotation of the drive screw enabled by a rotary prime mover. The drive assembly comprises a housing having an internal cavity, at least one drive nut insert having a helix portion substantially identical to the drive screw helix and disposed within said internal cavity, and a retaining clip engaging said at least one drive nut insert for substantial retainment thereof. Retaining clip further provides for simple replacement of such at least one drive nut insert during maintenance cycles thereby substantially eliminating periodic lubrication generally employed with powered door operators of the prior art.
    Type: Application
    Filed: April 23, 2002
    Publication date: December 26, 2002
    Inventors: Andre Stojc, Erich Stephen