Patents by Inventor Hugh J. Sinclair

Hugh J. Sinclair 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).

  • Air filter for use with aircraft ventilation systems
    Patent number: 5567230
    Abstract: An air filter unit for use with an air ventilation control nozzle in the cabin of an aircraft. The air filter unit includes a housing containing a filter medium, wherein the filter medium has a first side and a second side. The housing includes an inlet port positioned on the first side of the filter medium and an outlet port positioned on the second side of the filter medium, wherein the inlet port includes a connecting member dimensioned to snugly fit over the circumference of the ventilation control nozzle.
    Type: Grant
    Filed: April 5, 1995
    Date of Patent: October 22, 1996
    Inventor: Hugh J. Sinclair
  • Golf club head with aerodynamic upper surface
    Patent number: 4900029
    Abstract: A golf club head having an aerodynamic upper surface including a vertical airfoil and a cavity therein. The cavity includes a first planar surface sloping downwardly and rearwardly from behind the ball striking face, and an upstanding rear wall which acts as the front portion of the airfoil. A normal swing of the club head positions the airfoil at substantially right angles to the swing path creating an aerodynamic effect on the air flow to reduce drag and increase clubhead speed.
    Type: Grant
    Filed: March 16, 1989
    Date of Patent: February 13, 1990
    Inventor: Hugh J. Sinclair