Patents by Inventor Per Johan Madsen

Per Johan Madsen 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: 5826490
    Abstract: A compressor is disclosed, in particular for air-conditioning systems in vehicles, having at least one piston movable in a cylinder, a drive shaft and a wobble plate arrangement between the piston and the drive shaft. To improve the efficiency and to reduce leaks, the wobble plate arrangement comprises a swash plate, on which a wobble plate is rotatably mounted. Between the wobble plate and the piston is arranged a bearing which allows movement of the wobble plate relative to the piston in the circumferential direction.
    Type: Grant
    Filed: May 21, 1997
    Date of Patent: October 27, 1998
    Assignee: Danfoss A/S
    Inventors: Per Johan Madsen, Harry Stentoft Nissen, Jens Simonsen, Stig Helmer J.o slashed.rgensen, J.o slashed.rgen Holst
  • Patent number: 4118153
    Abstract: The invention relates to an encapsulated motor compressor assembly for refrigerators. An integrated motor compressor unit is resiliently supported inside the casing of the assembly on helical springs which engage the lower side of the stator laminations. The points of spring engagement are in a lower plane in which it is desired to prevent or minimize radial deflection of the motor compressor unit. This is accomplished by placing certain constraints on the design of the vertical motor shaft which has the usual eccentric crank for driving the compressor piston and a compensating weight for balancing the centrifugal effects of the crank. It was discovered that certain relationships between (1) the mass of the compensating weight and the spacing of its center of gravity from the shaft axis, and (2) the mass of the eccentric crank and the spacing of its center of gravity from the shaft axis, are in fact effective to minimize radial deflection of the motor compressor unit in the above referred to lower plane.
    Type: Grant
    Filed: April 11, 1977
    Date of Patent: October 3, 1978
    Assignee: Danfoss A/S
    Inventors: Jorgen Christian Stannow, Kjeld Kjeldsen, Hans Jurgen Tankred, Per Johan Madsen
  • Patent number: 4115035
    Abstract: The invention relates to a refrigeration type motor compressor assembly in which an integrated motor compressor unit is resiliently mounted in a sealed casing. A skeleton-like frame facilitates integrating the motor and compressor with a minimum amount of structural material. This frame includes a shaft bearing member and a cylinder member for the compressor function, these two members being joined by a beam member which is attached to the bearing member and extends to the cylinder member. The beam member has support posts depending therefrom which rest on the upper surface of the stator laminations.
    Type: Grant
    Filed: April 11, 1977
    Date of Patent: September 19, 1978
    Assignee: Danfoss A/S
    Inventors: Hans Jurgen Tankred, Per Johan Madsen