Patents by Inventor Richard D. Ritter

Richard D. Ritter 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).

  • Method for fine grinding
    Patent number: 5203511
    Abstract: A method and apparatus for fine grinding materials normally difficult to grind at ambient temperature, e.g. plastic and elastomeric materials in a fluid classification type impact mill utilizing liquid cryogen to pre-cool the material to be ground, to cool the material and the mill during grinding and to recycle vaporized cryogen from the mill back into the mill as the medium for conveying material to be ground into the mill.
    Type: Grant
    Filed: March 8, 1990
    Date of Patent: April 20, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Andrew P. Ondush, Richard D. Ritter, Arthur H. Anderson
  • Apparatus for fine grinding
    Patent number: 5195695
    Abstract: A method and apparatus for fine grinding materials normally difficult to grind at ambient temperature, e.g. plastic and elastomeric materials in a fluid classification type impact mill utilizing liquid cryogen to pre-cool the material to be ground, to cool the material and the mill during grinding and to recycle vaporized cryogen from the mill back into the mill as the medium for conveying material to be ground into the mill.
    Type: Grant
    Filed: March 8, 1990
    Date of Patent: March 23, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Andrew P. Ondush, Richard D. Ritter, Arthur H. Anderson
  • Hose cooling chamber with cold gas recycle
    Patent number: 4654107
    Abstract: The present invention relates to an improved cooling chamber for the manufacture of high-pressure reinforced hose. Hose to be treated is passed through a tubular passageway in the cooling chamber where it is contacted with a cryogenic fluid. A portion of the cryogenic fluid is passively recycled via a recycle loop to provide further cooling within the tubular passageway. An end seal is attached to one end of the cooling chamber to prevent moisture build-up and freezing inside the chamber.
    Type: Grant
    Filed: August 30, 1985
    Date of Patent: March 31, 1987
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Richard D. Ritter
  • Hose cooling process with cold gas recycle
    Patent number: 4654094
    Abstract: The present invention relates to an improved cooling process for the manufacture of high-pressure reinforced hose. Hose to be treated is passed through a cooling chamber where it is contacted with a cryogenic fluid which totally flashes to a cold gas upon contact with the hose. A portion of the cold gas is passively recycled to provide further cooling. One end of the cooling chamber is sealed to prevent moisture build-up and freezing inside the chamber.
    Type: Grant
    Filed: August 30, 1985
    Date of Patent: March 31, 1987
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Richard D. Ritter