Patents by Inventor Donald R. MacLeod

Donald R. MacLeod 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: 4565495
    Abstract: An armoring system for use with an airfoil centrifugal fan for preventing erosion of the airfoil blades of the fan. The armoring system comprises an armor shield adapted to be releasably secured to at least a portion of the upper surface of the fan blades to prevent erosion thereof. The armoring system further includes mounting means cooperating with the armor shield for releasably securing the armor shield to the blades. The mounting means are positionable within the hollow space formed by the upper and lower surfaces of the blades to structurally reinforce the blades without altering their aerodynamic shape.
    Type: Grant
    Filed: August 11, 1983
    Date of Patent: January 21, 1986
    Assignee: Electric Power Research Institute, Inc.
    Inventor: Donald R. MacLeod, Jr.
  • Patent number: 4174031
    Abstract: A series of conveyor idler roll shafts in end-to-end relation supported by bearings provides a pressurized chamber for the flow of grease or oil to the bearings from a reservoir, which is capable of pumping the lubricant into the axial bore of each shaft. Small, radially directed holes connect the shaft bores to the bearings by providing a restricted passage having across it a suitable pressure drop capable of allowing lubricant to flow in sufficient quantities to each bearing regardless of its distance from the reservoir pressure source. Adjacent shaft ends are connected with a resilient cylindrical tubular coupler to provide the requisite flow passage continuity. A labyrinth seal provides a continuous path for lubricant to flow through the bearings, the seal and ultimately to the exterior of the system, where its appearance is visible and indicative of adequate lubricant flow to each bearing along the shaft assembly.
    Type: Grant
    Filed: March 27, 1978
    Date of Patent: November 13, 1979
    Assignee: Rexnord Inc.
    Inventor: Donald R. MacLeod
  • Patent number: 3984160
    Abstract: The specification describes two embodiments of a one-piece rear grease seal for an idler roller mounted on a shaft. Both embodiments comprise an annular lip in the shape of a truncated cone, an annular ring integrally connected to the larger end of the annular lip, and an annular web integrally connected to the outer end of the annular ring. In one embodiment, an annular groove is found on the annular ring to receive an axial end of an inner tube mounted concentrically about the shaft; the other embodiment does not have this feature.
    Type: Grant
    Filed: December 10, 1975
    Date of Patent: October 5, 1976
    Assignee: Rexnord Inc.
    Inventors: Jerome F. Sheldon, Donald R. MacLeod