Patents by Inventor Norman Lawrence Parr

Norman Lawrence Parr 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).

  • Composite materials
    Patent number: 4055451
    Abstract: The invention concerns a method of fabricating ceramic/metal or ceramic/ceramic composites. A porous surface region is produced on a ceramic material by sintering a granular substance onto the latter. Metal infiltrated into the porous region is then firmly mechanically bonded to the ceramic. Alternatively, the porous region provides a surface of large effective area to which another ceramic may be bonded chemically and mechanically.
    Type: Grant
    Filed: May 21, 1976
    Date of Patent: October 25, 1977
    Inventors: Alan Gray Cockbain, Michael John Latimer, Norman Lawrence Parr
  • Temperature compensating ceramic metal bearing systems
    Patent number: 3942847
    Abstract: The invention concerns a temperature compensating bearing for a shaft in which an expandable helical ceramic member is provided between the shaft and the bearing housing. The expandable helical ceramic member functions by expanding and contracting sympathetically with any changes in shaft diameter due to change of temperature of the bearing.
    Type: Grant
    Filed: January 18, 1974
    Date of Patent: March 9, 1976
    Assignee: National Research Development Corporation
    Inventor: Norman Lawrence Parr