Patents by Inventor Donald Coulthart

Donald Coulthart 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).

  • Seal for a rotating shaft
    Patent number: 8114024
    Abstract: An encapsulated rotary seal around a rotating shaft, the seal having an outer annular body and an inner annular body. The inner annular body engages the rotating shaft and permits free rotation of the shaft while providing a liquid tight seal around the rotating shaft. The outer annular body is molded about and permanently adhered to the inner annular body, the outer annular body permitting limited non-concentric or eccentric movement of the rotating shaft engaged to the inner annular body without affecting the integrity of the seal between the rotating shaft and the inner annular body.
    Type: Grant
    Filed: August 6, 2008
    Date of Patent: February 14, 2012
    Inventors: Roman Solek, Donald Coulthart
  • SEAL FOR A ROTATING SHAFT
    Publication number: 20090051121
    Abstract: An encapsulated rotary seal around a rotating shaft, the seal having an outer annular body and an inner annular body. The inner annular body engages the rotating shaft and permits free rotation of the shaft while providing a liquid tight seal around the rotating shaft. The outer annular body is moulded about and permanently adhered to the inner annular body, the outer annular body permitting limited non-concentric or eccentric movement of the rotating shaft engaged to the inner annular body without affecting the integrity of the seal between the rotating shaft and the inner annular body.
    Type: Application
    Filed: August 6, 2008
    Publication date: February 26, 2009
    Applicant: Interson Corporation
    Inventors: Roman Solek, Donald Coulthart