Patents by Inventor John W. Pelava

John W. Pelava 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).

  • Partially fluorinated silicone refrigeration lubricants
    Patent number: 5378385
    Abstract: The present invention provides a composition for use in compression refrigeration and air-conditioning. The composition comprises: (a) a refrigerant selected from the group consisting of hydrofluorocarbon and hydrochlorofluorocarbon; and (b) a sufficient amount to provide lubrication of at least one fluorinated silicone. The fluorinated silicone has units therein selected from the group consisting of fluoroalkyl and alkyl. If both fluoroalkyl and alkyl units are present in the fluorinated silicone, at least 25% of the units are fluoroalkyl. The fluorinated silicone has a molecular weight between about 280 and about 6,000; a viscosity of about 10 to about 300 centistokes at 38.degree. C. (0.1 to 3 cm.sup.2 /sec), and is miscible in combination with the refrigerant in the range between -40.degree. C. and at least +20.degree. C.
    Type: Grant
    Filed: December 21, 1989
    Date of Patent: January 3, 1995
    Assignee: AlliedSignal Inc.
    Inventors: Raymond H. P. Thomas, David P. Wilson, Hang Pham, John W. Pelava
  • Refrigeration lubricant blends
    Patent number: 4900463
    Abstract: The present invention provides a lubricating composition. The composition comprises a single phase blend of (i) at least one polyoxyalkylene glycol which has a molecular weight between 300 and 2000, a viscosity of about 10-157 centistokes at 37.degree. C., and a viscosity index of at least 20 and (ii) a chlorotrifluoroethylene oil having a viscosity of about 0.8-1000 centistokes at 25.degree. C. The blend is miscible in combination with the tetrafluoroethane in the range between 0.degree. C. and at least +5.degree. C.
    Type: Grant
    Filed: May 23, 1989
    Date of Patent: February 13, 1990
    Assignee: Allied-Signal Inc.
    Inventors: Raymond H. P. Thomas, Hillel Magid, David P. Wilson, John W. Pelava
  • Refrigeration lubricants
    Patent number: 4755316
    Abstract: Compression refrigeration equipment using tetrafluoroethane as a working fluid employs polyoxyalkylene glycols which are at least difunctional with respect to hydroxyl groups and a molecular weight between 300 and 2000. The mixtures of the glycols with the refrigerant will be miscible in the range from -40.degree. C. to at least + 20.degree. C.
    Type: Grant
    Filed: October 23, 1987
    Date of Patent: July 5, 1988
    Assignee: Allied-Signal Inc.
    Inventors: Hillel Magid, Raymond Thomas, Leonard Stiel, John W. Pelava
  • Azeotrope-like compositions of trichlorotrifluoroethane, methanol, nitromethane, acetone, and methyl acetate
    Patent number: 4683075
    Abstract: Azeotrope-like compositions comprising of trichlorotrifluoroethane, methanol, nitromethane, acetone, and methyl acetate which are stable and have utility as vapor degreasing agents and as solvents in a variety of industrial cleaning applications including the defluxing of printed circuit boards.
    Type: Grant
    Filed: July 23, 1986
    Date of Patent: July 28, 1987
    Assignee: Allied Corporation
    Inventors: David P. Wilson, Hang T. Pham, Earl A. E. Lund, Rajat S. Basu, John W. Pelava
  • Nonazeotropic refrigerant composition containing monachlorodifluoromethane, and method of use
    Patent number: 4303536
    Abstract: A novel nonazeotropic mixture containing R-22 and either R-124 or R-152a. This mixture has an improved efficiency in cooling and heating applications. Also provided is a method for producing refrigeration and a method for producing heating using this mixture.
    Type: Grant
    Filed: December 29, 1980
    Date of Patent: December 1, 1981
    Assignee: Allied Corporation
    Inventors: Sabatino R. Orfeo, Robert A. Allen, Leonard I. Stiel, John W. Pelava