Patents by Inventor Charles D. Barrett

Charles D. Barrett 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: 5435414
    Abstract: A lubricating recirculation system for use with highly viscous lubricants and semi-fluid lubricants such as high viscosity base oil gels and greases. The system includes a bulk lubricant container for storing fresh lubricant that is applied to the use points of the mechanisms as controlled by a controller such as programmable logic controller. After application to the mechanism components, the lubricant falls therefrom and accumulates on guards or channels which help to funnel the lubricant into a spent lubricant holding tank. Sensors in both the bulk lubricant container and the spent lubricant holding tank, in connection with the controller, monitor the level of lubricant in both tanks and activate a transfer pump when the level of lubricant in either tank reaches a certain level.
    Type: Grant
    Filed: January 5, 1994
    Date of Patent: July 25, 1995
    Assignee: Castrol Ltd.
    Inventor: Charles D. Barrett
  • Patent number: 5251725
    Abstract: A lubricator for large diameter open gearing utilizes a header having a series of orifices which direct streams of oil onto a deflector plate which produces a spray directed at the teeth of a drive pinion in close proximity to the point of first engagement on the approach side of the pitch point. Air turbulence generated by movement of the gear teeth is prevented from affecting the spray pattern by utilizing a collector for excess lubricant as a baffle and by utilizing the deflector plate to block the movement of air. Uniformity of spray pattern from the orifices is enhanced by providing a pressure relief valve remote from the feed points of the header.
    Type: Grant
    Filed: July 7, 1992
    Date of Patent: October 12, 1993
    Assignee: Castrol Limited
    Inventor: Charles D. Barrett, Jr.