Patents by Inventor Joseph F. Demendi

Joseph F. Demendi 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 body of silicon carbide and binderless carbon, process for producing such composite body, and article of manufacturing utilizing such composite body for tribological applications
    Patent number: 6716800
    Abstract: A composite body of silicon carbide having binderless, allotropic carbon granules distributed throughout is produced. The nominal size of the binderless allotropic carbon granules can range from 5 to 500 micrometers. The concentration of the binderless allotropic carbon particles can vary from 1.0 to 35.0 weight percent. The process to produce such a composite body is to sinter silicon carbide with binderless, carbon-yielding precursor granules. The composite body is utilized in tribological applications. The dense, impervious silicon carbide-binderless carbon composite exhibits excellent physical and tribological characteristics when used as a mechanical face seal, a sliding bearing arrangement, or some other rubbing component.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: April 6, 2004
    Assignee: John Crane Inc.
    Inventors: Joseph F. Demendi, Xin Chen, William R. Clemens
  • Composite body of silicon carbide and binderless carbon, process for producing such composite body, and article of manufacture utilizing such composite body for tribological applications
    Publication number: 20030195122
    Abstract: A composite body of silicon carbide having binderless, allotropic carbon granules distributed throughout is produced. The nominal size of the binderless allotropic carbon granules can range from 5 to 500 micrometers. The concentration of the binderless allotropic carbon particles can vary from 1.0 to 35.0 weight percent. The process to produce such a composite body is to sinter silicon carbide with binderless, carbon-yielding precursor granules. The composite body is utilized in tribological applications. The dense, impervious silicon carbide-binderless carbon composite exhibits excellent physical and tribological characteristics when used as a mechanical face seal, a sliding bearing arrangement, or some other rubbing component.
    Type: Application
    Filed: April 12, 2002
    Publication date: October 16, 2003
    Applicant: John Crane Inc.
    Inventors: Joseph F. Demendi, Xin Chen, William R. Clemens
  • Carbon composite mateiral for tribological applications
    Patent number: 5538649
    Abstract: A composition of matter for use in tribological applications, such as in mechanical seals, bearings and other sliding or rubbing components, which provides good durability and wear characteristics. The material is used in the "softer" one of two relatively sliding members which are in, or may come into, contact with each other during the relative rotation of one of the member s relative to the other. The material is a carbon or carbonaceous formed material, such as is normally used in the manufacture of a primary seal ring in a mechanical seal, and comprises an additive compound which contains at least one compound from a group consisting of neodymium fluoride, praseodymium fluoride, gadolinium fluoride and lanthanum fluoride.
    Type: Grant
    Filed: September 28, 1995
    Date of Patent: July 23, 1996
    Assignee: John Crane Inc.
    Inventors: Joseph F. Demendi, Philippe R. Malle, Yannick A. Le Neve, Xin Chen, William R. Clemens