Patents by Inventor Cyril A. M. Blizzard

Cyril A. M. Blizzard 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).

  • Apparatus for improving acceleration in a multi-shaft gas turbine engine
    Patent number: 4640091
    Abstract: A free turbine, gas turbine engine provided with a pre-swirl arrangement in the compressor, based on bleeding air from the compressor and using the bleed air as a pre-swirl device upstream of the compressor to increase its rotational speed. A governor device, driven from the compressor rotor, controls the amount of pre-swirl bleed air to maintain a constant compressor speed from minimum to maximum power. Compressor rotor and gas inertia effects during acceleration are thus eliminated.
    Type: Grant
    Filed: January 8, 1986
    Date of Patent: February 3, 1987
    Assignee: Pratt & Whitney Canada Inc.
    Inventor: Cyril A. M. Blizzard
  • Method and apparatus for improving acceleration in a multi-shaft gas turbine engine
    Patent number: 4590759
    Abstract: A free turbine, gas turbine engine provided with a pre-swirl arrangement in the compressor, based on bleeding air from the compressor and using the bleed air as a pre-swirl device upstream of the compressor to increase its rotational speed. A governor device, driven from the compressor rotor, controls the amount of pre-swirl bleed air to maintain a constant compressor speed from minimum to maximum power. Compressor rotor and gas inertia effects during acceleration are thus eliminated.
    Type: Grant
    Filed: January 27, 1984
    Date of Patent: May 27, 1986
    Assignee: Pratt & Whitney Canada Inc.
    Inventor: Cyril A. M. Blizzard