Patents by Inventor Stanley J. W. Riches

Stanley J. W. Riches 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).

  • Apparatus for recycling engine lubricating oil
    Patent number: 4128140
    Abstract: Equipment for draining and refilling the lubricating oil sump of a motor vehicle comprises a large capacity main oil reservoir. Inlet means to the reservoir from the sump include a vessel which is evacuated to suck oil from the sump and pressurized to cause the oil to flow into the reservoir. Oil rejuvenating means are included in the inlet. Means are provided for discharging a metered dose of oil back to the sump from the reservoir.
    Type: Grant
    Filed: March 24, 1977
    Date of Patent: December 5, 1978
    Assignee: The Post Office
    Inventor: Stanley J. W. Riches