Patents Examined by A. Basichas
  • Method of making foam in an energy efficient compressor
    Patent number: 5499908
    Abstract: An energy efficient hermetic compressor for compressing hydrofluorocarbon refrigerants. The compressor includes a motor compressor unit with a rotating oil pickup tube to which an oil paddle is attached. The oil paddle rotates in a base lubricant of polyol ester mixed with a siloxane ester foaming agent. The combination of the foaming additive with the oil paddle creates a foam layer that floats in the oil sump to reduce the sound level of the compressor.
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: March 19, 1996
    Assignee: Tecumseh Products Company
    Inventor: Raymond J. Schmitz, III