Patents Examined by J. A. Simenauer
  • Patent number: 4325673
    Abstract: A diffuser for a centrifugal compressor has an annular array of vanes which is movable to vary the configuration of the diffusing passages between the vanes. Each vane includes suction and pressure surfaces joined at an inlet apex and divergent therefrom to form a wedge-shaped control surface between fixed, spaced parallel side walls of the diffuser and pivoted about the apex for varying flow area through the diffuser. Each vane has an elastomeric inner portion which is selectively inflatable to expand to either side of said wedge-shaped control surface to sealingly engage the spaced parallel side walls to seal against gas flow between the pressure surface and the suction surface on each of the vanes.
    Type: Grant
    Filed: March 10, 1980
    Date of Patent: April 20, 1982
    Assignee: General Motors Corporation
    Inventor: Beuford C. Hall, Jr.