Patents by Inventor Les Milewski

Les Milewski 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).

  • Bypass damper in series-type ventilation fan
    Patent number: 5236393
    Abstract: A series-type fan includes an air intake exposed to both ambient and forced ventilation air, a variable capacity fan, and multiple ports positioned downstream from the fan. One of the ports has a damper attached thereto which closes when the fan is de-energized to prevent backspin of the fan.
    Type: Grant
    Filed: December 22, 1992
    Date of Patent: August 17, 1993
    Assignee: Metal Industries, Inc.
    Inventor: Les Milewski
  • Multiple point velocity probe
    Patent number: 4912973
    Abstract: A device for measuring the velocity of a fluid such as gas or air, traveling through a duct, which device relies upon a series of precisely controlled apertures for gathering a plurality of fluid samples and presenting the summation of the samples to a central velocity sensor. The device precisely controls the volume of the fluid which can flow across the sensor, thereby preventing pressure gradients within the measuring device from modifying the velocity measurements.
    Type: Grant
    Filed: October 14, 1988
    Date of Patent: April 3, 1990
    Assignee: Metal Industries
    Inventors: Les Milewski, Ivan Doskocil