Patents by Inventor Juha Pyrhönen

Juha Pyrhönen 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 apparatus, such as a liquid ring machine and a method for driving a drive apparatus, such as transferring fluid
    Patent number: 6347926
    Abstract: An actuator, such as a liquid ring machine, and a method in an actuator, such as transferring of fluid, is such that the machine includes a casing part within which a rotatable blade rotor is arranged. The casing part forms a hollow rotatable rotor, the inner space thereof receiving the blade rotor. A stator is provided around the casing part, whereby the casing part is rotated by an electromagnetic field between the stator and the casing part arranged to form a rotor of an electric machine.
    Type: Grant
    Filed: March 30, 1999
    Date of Patent: February 19, 2002
    Assignee: Rotatek Finland Oy
    Inventor: Juha Pyrhönen
  • Rotor for an electric machine and a method in an electric machine
    Patent number: 6184606
    Abstract: A solid rotor for an electric machine includes a short circuit ring of a metal material having good electrical conductivity. The short circuit ring is attached to an end face of the rotor, and includes at least two portions formed of different materials. A first portion of the short circuit ring is of a material which has essentially similar characteristics to the characteristics of the material of the rotor.
    Type: Grant
    Filed: November 30, 1998
    Date of Patent: February 6, 2001
    Assignee: Rotatek Finland Oy
    Inventor: Juha Pyrhönen