Patents by Inventor Anders Jansson

Anders Jansson 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).

  • Patent number: 6600393
    Abstract: A temperature-compensated rod resonator, comprising a housing (10) having electrically conducting walls, including at least one electrically conductive resonator rod (14) extending from a bottom wall (11) towards a top wall (13), a temperature-compensating plate (20) located adjacent to said top wall (13) and coupling means (150, 151) for transferring electromagnetic energy to and from the resonator. The plate (20) is adapted to change its geometrical configuration in response to temperature variations. The temperature-compensating plate is a bimetallic plate (20) having a larger diameter than the resonator rod (14). A central portion (21) of said bimetallic plate (20) is secured to the upper end of the resonator rod (14), whereby the bimetallic plate, in conjunction with the adjacent top wall (13) defines a capacitance, which has a dominating influence on the resonance frequency.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: July 29, 2003
    Assignee: Allgon AB
    Inventors: Fredrik Pahlman, Anders Jansson, Per Hogberg
  • Patent number: 6563251
    Abstract: In a method according to the present invention, charging and discharging of motor phases (10A, 10B) in an electromechanical motor is performed with a small voltage difference between the voltage source and the capacitive load of the motor phase (10A, 10B). This is accomplished by connecting a series of voltage sources (36), one at a time. Energy from the discharging operation is stored to be used in subsequent charging operations. In a device according to the present invention, the voltage sources (36) are preferably provided by means of capacitive or induction voltage step-up or step-down circuits. Preferably, switches (34) control the charging and discharging. In a preferred embodiment, the capacitance of one motor phase (10A) is used for storing charge resulting from the discharge from another motor phase (10B).
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: May 13, 2003
    Assignee: Piezomotor Uppsala AB
    Inventors: Anders Jansson, Karl HÃ¥kansson, Stefan Johansson
  • Publication number: 20020113563
    Abstract: In a method according to the present invention, charging and discharging of motor phases (10A, 10B) in an electromechanical motor is performed with a small voltage difference between the voltage source and the capacitive load of the motor phase (10A, 10B). This is accomplished by connecting a series of voltage sources (36), one at a time. Energy from the discharging operation is stored to be used in subsequent charging operations. In a device according to the present invention, the voltage sources (36) are preferably provided by means of capacitive or induction voltage step-up or step-down circuits. Preferably, switches (34) control the charging and discharging. In a preferred embodiment, the capacitance of one motor phase (10A) is used for storing charge resulting from the discharge from another motor phase (10B).
    Type: Application
    Filed: February 20, 2001
    Publication date: August 22, 2002
    Inventors: Anders Jansson, Karl Hakansson, Stefan Johansson
  • Publication number: 20020060031
    Abstract: Machine equipment in a paper or board machine comprising at least one wear ledge for contact with a clothing, and a support body for the wear ledge and a device for mounting the wear ledge to its support body. In accordance with the invention, the mounting device has a locking bar arranged in a groove in the wear ledge, and a cavity is formed in the support body and contains a press bar. The support body defines a plurality of holes extending from the cavity and open toward the groove in the wear ledge. Connecting elements extend through the holes and are rigidly connected to the clamping bar and the press bar, and spring members in the cavity act between the press bar and an opposite support surface of the cavity to retain the wear ledge against the support body in a stable operating position. An expandable hose is arranged in the cavity so as, when activated, to press against the press bar so that the spring members are compressed and the wear ledge becomes free for pulling out along the locking bar.
    Type: Application
    Filed: March 20, 2001
    Publication date: May 23, 2002
    Applicant: Valmet-Karlstad AB
    Inventor: Per Anders Jansson
  • Patent number: 6379503
    Abstract: Machine equipment in a paper or board machine comprising at least one wear ledge for contact with a clothing, and a support body for the wear ledge and a device for mounting the wear ledge to its support body. In accordance with the invention, the mounting device has a locking bar arranged in a groove in the wear ledge, and a cavity is formed in the support body and contains a press bar. The support body defines a plurality of holes extending from the cavity and open toward the groove in the wear ledge. Connecting elements extend through the holes and are rigidly connected to the clamping bar and the press bar, and spring members in the cavity act between the press bar and an opposite support surface of the cavity to retain the wear ledge against the support body in a stable operating position. An expandable hose is arranged in the cavity so as, when activated, to press against the press bar so that the spring members are compressed and the wear ledge becomes free for pulling out along the locking bar.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: April 30, 2002
    Assignee: Metso Paper Karlstad AB
    Inventor: Per Anders Jansson
  • Publication number: 20010030585
    Abstract: A method for characterizing a frequency response of a tunable filter (11) includes the steps of adjusting a tuning means (12) to a first predetermined position; measuring the resonance frequency of the filter (10); temporary storing the measured resonance frequency and the position; and repeating these steps for a number of different predetermined positions of the tuning means. A mathematical function representing tuning means position as a function of resonance frequency is then determined, whereby several advantages are achieved. Little memory is required and the function provides for rapid and accurate tuning of the filter.
    Type: Application
    Filed: February 16, 2001
    Publication date: October 18, 2001
    Inventors: Anders Jansson, Lennart Larsson, Bjorn Johansson, Rolf Folkesson, Torbjorn Lindh, Carl-Johan Wagner