Patents by Inventor Patrick R Ashill

Patrick R Ashill 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).

  • Patent number: 6651927
    Abstract: An aerofoil wing comprising upper and lower surfaces meeting at the leading and trailing edges and a camber line representing the curvature of the aerofoil comprising at least two regions of substantially linear increases in curvature and wherein the increases in curvature are of monotonically increasing magnitude. Preferably there are three regions of substantially linear increases in curvature.
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: November 25, 2003
    Assignee: Qinetiq Limited
    Inventors: Kevin C Hackett, Patrick R Ashill, John E Green
  • Patent number: 5433404
    Abstract: A wing, or similar article of airfoil section, has a variable geometry surface for the active control of shock strength and transonic wave drag. In one embodiment, the wing has a region of distensible skin (4) aft of the line of maximum section, which extends along the span of the wing in those areas that experience drag. Pressure means (10, 20, 30) within the wing outwardly deflect the distensible region and produce a local bulge in the expansion surface. This bulge induces pre-shock compression and reduces the effect of the shock. The bulge is retracted by the natural elasticity of the skin material (which can be a conventional aluminum alloy) upon removal of the applied pressure. In another embodiment, the wing has a ramp portion (14) which is outwardly deflectable for the same purpose. The invention is applicable to supercritical and natural laminar flow wings.
    Type: Grant
    Filed: May 25, 1994
    Date of Patent: July 18, 1995
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Patrick R. Ashill, John L. Fulker
  • Patent number: 4718619
    Abstract: The manoeuverable supercritical wing section with a t/c ratio of 8-9%, flexible at 70%-80% chord by means of a flap to induce expansion thereover, and perhaps having a minimum curvature region on the upper surface just ahead of the flexing region.
    Type: Grant
    Filed: July 20, 1984
    Date of Patent: January 12, 1988
    Assignee: Ministry of Defence
    Inventors: Patrick R. Ashill, Donald Pierce, Desmond A. Treadgold, John L. Fulker