Patents by Inventor Per Thornblad

Per Thornblad 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).

  • Friction- and form-grip connection of rotating components
    Patent number: 6276863
    Abstract: In a friction- and form-grip connection of rotating components (1, 2) which have different expansion behavior in the region of the connection during rotation, the form grip is effected via a stepped centering seat (3). The friction grip between the two components is effected by means of axially prestressed elements. At least one of the components has a cavity (6) in the interior, in which cavity (6) an insert ring (7), which exerts a radial force on the centering seat (3) during operation, is arranged. The prestressed insert ring (7) bears with only part of its axial extent against the component (1) interacting with it.
    Type: Grant
    Filed: July 17, 2000
    Date of Patent: August 21, 2001
    Assignee: Asea Brown Boveri AG
    Inventors: Harry Alkelin, Mikael Fryklund, Roland Nilsson, Per Thörnblad, Hans Wettstein
  • Friction- and form-grip connection of rotating components
    Patent number: 6126357
    Abstract: In a friction- and form-grip connection of rotating components (1, 2) which have different expansion behavior in the region of the connection during rotation, the form grip is effected via a stepped centering seat (3). The friction grip between the two components is effected by way of axially prestressed elements. At least one of the components has a cavity (6) in the interior, in which cavity (6) an insert ring (7), which exerts a radial force on the centering seat (3) during operation, is arranged. The prestressed insert ring (7) bears with only part of its axial extent against the component (1) interacting with it.
    Type: Grant
    Filed: June 29, 1998
    Date of Patent: October 3, 2000
    Assignee: Asea Brown Boveri AG
    Inventors: Harry Alkelin, Mikael Fryklund, Roland Nilsson, Per Thornblad, Hans Wettstein
  • Power plant with centrifugal separators for returning material from combustion gases to a fluidized bed
    Patent number: 4730563
    Abstract: A power plant with combustion of a fuel in a fluidized bed (14) enclosed within a combustion chamber in a bed vessel (11). A gas outlet from the bed vessel (11) is formed as a centrifugal separator (20) intended to primarily separate coarse material containing unburnt fuel leaving the bed (11) together with the combustion gases. Suitably the separator (20) extends into the bed vessel (11) and separated material is returned to the bed (14) through a return conduit (34), which is preferably located close to the bed vessel wall. This conduit (34) opens into the bed vessel (11), near the bottom (12) thereof. For the return transport an ejector (35) may be used to overcome the pressure difference existing between the separator (20) and the orifice of the conveying conduit (34). The propellent gas may consist of combustion air from the space (16).
    Type: Grant
    Filed: February 20, 1987
    Date of Patent: March 15, 1988
    Assignee: Asea Stal Aktiebolag
    Inventor: Per Thornblad