Patents Assigned to Envirosolv
  • High-efficiency, low-emissions cleaning method and apparatus
    Patent number: 5156173
    Abstract: A cleaning apparatus that provides for immersion cleaning in one or two solvents. Using a source of inert gas and a recycling loop, the apparatus provides a drying zone above the solvents and prevents escape of solvent vapor into the surrounding atmosphere. The recycling loop maintains nonequilibrium vapor conditions and includes a centrifugal separator, which facilitates separation and recovery of the solvent vapors and the inert gas during normal operation of the system.
    Type: Grant
    Filed: May 14, 1991
    Date of Patent: October 20, 1992
    Assignee: Envirosolv
    Inventors: Gene E. Keyser, Robert L. Klopfenstein