Patents by Inventor Michael P. Mackelfresh

Michael P. Mackelfresh 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).

  • Radial compliance mechanism for co-rotating scroll apparatus
    Patent number: 5713731
    Abstract: A scroll type fluid handling apparatus, such as a refrigeration compressor, has co-rotating driver and idler scroll members supported for rotation about offset, generally parallel axes. The idler scroll member has a support shaft which is supported on the compressor housing by a pivot bushing having an eccentric pivot axis which permits radially compliant movement of the idler scroll along a line of action which is predetermined to provide a component of a resultant force acting between the scroll members which will urge the idler scroll wrap into engagement with the driver scroll wrap under a wide range of operating conditions to enhance the contact line seal between the scroll wraps.
    Type: Grant
    Filed: August 21, 1996
    Date of Patent: February 3, 1998
    Assignee: Alliance Compressors
    Inventors: Robert E. Utter, Chih M. Lin, Michael P. Mackelfresh
  • Radial compliance mechanism for corotating scroll apparatus
    Patent number: 5609478
    Abstract: A scroll type fluid handling apparatus, such as a refrigeration compressor, has co-rotating driver and idler scroll members supported for rotation about offset, generally parallel axes. The idler scroll member has a support shaft which is supported on the compressor housing by a pivot bushing having an eccentric pivot axis which permits radially compliant movement of the idler scroll along a line of action which is predetermined to provide a component of a resultant force acting between the scroll members which will urge the idler scroll wrap into engagement with the driver scroll wrap under a wide range of operating conditions to enhance the contact line seal between the scroll wraps.
    Type: Grant
    Filed: November 6, 1995
    Date of Patent: March 11, 1997
    Assignee: Alliance Compressors
    Inventors: Robert E. Utter, Chih M. Lin, Michael P. Mackelfresh