Patents by Inventor Risto Kiviranta

Risto Kiviranta 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).

  • Mounting and dismounting mechanism for a straightening or calibrating roller rotatable about a spindle and provided with a circular groove
    Patent number: 6884013
    Abstract: The invention relates to a mounting and dismounting mechanism for a straightening or calibrating roller (2) rotatable about a spindle (1) and provided with a circular groove (13). The spindle (1) has its cavity (4) fitted with a pusher (9), having a tapered thrust face (9a, 9b) which shifts, as a result of the force of a spring (10), a holder element (8) from its release position to its clamping position. The holder element (8) is located in an opening present in a wall (3) of the cylinder (4). A plunger (11), associated with the pusher (9), can be used for moving the pusher against the force of the spring (10) to a position in which the holder element (8) is capable of shifting from its clamping position to its release position in which the roller is removable from the spindle (1) or mountable onto the spindle.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: April 26, 2005
    Assignee: T-Drill Oy
    Inventors: Risto Kiviranta, Pertti Lehto
  • Mounting and dismounting mechanism for a straightening or calibrating roller rotatable about a spindle and provided with a circular groove
    Publication number: 20020092726
    Abstract: The invention relates to a mounting and dismounting mechanism for a straightening or calibrating roller (2) rotatable about a spindle (1) and provided with a circular groove (13). The spindle (1) has its cavity (4) fitted with a pusher (9), having a tapered thrust face (9a, 9b) which shifts, as a result of the force of a spring (10), a holder element (8) from its release position to its clamping position. The holder element (8) is located in an opening present in a wall (3) of the cylinder (4). A plunger (11), associated with the pusher (9), can be used for moving the pusher against the force of the spring (10) to a position in which the holder element (8) is capable of shifting from its clamping position to its release position in which the roller is removable from the spindle (1) or mountable onto the spindle.
    Type: Application
    Filed: November 21, 2001
    Publication date: July 18, 2002
    Inventors: Risto Kiviranta, Pertti Lehto