Patents by Inventor Robert E. MacPherson, Jr.

Robert E. MacPherson, Jr. 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: 4938785
    Abstract: The specification discloses an apparatus and method for separating liquid droplets carried in a gas wherein the gas is conducted at a subsonic velocity below about Mach 0.7 through a conduit, the walls of which define successive, generally oppositely directed arcuate bends to cause transverse movement of the droplets toward and into contact with the walls by centrifugal force and in a manner which avoids conditions giving rise to flow separation and any attendant turbulence and pressure drop. The walls include a porous medium covering at least a portion of the surface thereof and through which liquid directed against the wall is withdrawn from the conduit. According to one aspect of the invention, a porous medium is provided on the stator blades of a turbine power generator to enable removal of accumulated liquid thereon and thereby reduce rotor blade erosion and power losses associated with dribble from the stator blades onto the rotor blades.
    Type: Grant
    Filed: July 10, 1989
    Date of Patent: July 3, 1990
    Assignee: PAI Corporation
    Inventors: Robert E. MacPherson, Jr., Arthur P. Fraas, Doan L. Phung