Patents by Inventor Ernst Studhalter

Ernst Studhalter 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).

  • Elevator shaft closure and method of fulfilling fire protection requirements of an elevator shaft closure and of mounting the same
    Patent number: 7140471
    Abstract: An elevator shaft closure and a method of fulfilling fire protection requirements for the same include a shaft door frame having in the region of the closing edge of the frame with a door leaf of at least two door frame parts attached to a building and connected together with a thermally separable material. Under a predetermined stress, the connection between the door frame parts is released and one of the door frame parts displaces in front of the door leaf while the other door frame part substantially retains its original shape.
    Type: Grant
    Filed: February 5, 2004
    Date of Patent: November 28, 2006
    Assignee: Inventio AG
    Inventor: Ernst Studhalter
  • Elevator shaft closure and method of fulfilling fire protection requirements of an elevator shaft closure and of mounting the same
    Publication number: 20050098388
    Abstract: An elevator shaft closure and a method of fulfilling fire protection requirements for the same include a shaft door frame having in the region of the closing edge of the frame with a door leaf of at least two door frame parts attached to a building and connected together with a thermally separable material. Under a predetermined stress, the connection between the door frame parts is released and one of the door frame parts displaces in front of the door leaf while the other door frame part substantially retains its original shape.
    Type: Application
    Filed: February 5, 2004
    Publication date: May 12, 2005
    Inventor: Ernst Studhalter
  • Emergency unlocking device at shaft doors of elevators
    Patent number: 6851521
    Abstract: An emergency unlocking device includes an unlocking lever actuated by an unlocking slide that is guided in a guide fastened to the inner side of the shaft door. The guide covers a passage that is formed in the shaft door for insertion of a tool for actuation of the unlocking slide so that in the case of a fire the flame cannot pass through the passage to the elevator shaft.
    Type: Grant
    Filed: December 19, 2002
    Date of Patent: February 8, 2005
    Assignee: Inventio AG
    Inventor: Ernst Studhalter
  • Emergency unlocking device at shaft doors of elevators
    Publication number: 20030116383
    Abstract: An emergency unlocking device includes an unlocking lever actuated by an unlocking slide that is guided in a guide fastened to the inner side of the shaft door. The guide covers a passage that is formed in the shaft door for insertion of a tool for actuation of the unlocking slide so that in the case of a fire the flame cannot pass through the passage to the elevator shaft.
    Type: Application
    Filed: December 19, 2002
    Publication date: June 26, 2003
    Inventor: Ernst Studhalter