Patents by Inventor Douglas L. Wenham

Douglas L. Wenham 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: 4607596
    Abstract: A milking apparatus utilizing a pumping vessel which provides both vacuum and pulsating pressure to the outer and inner chambers respectively of two chambered breast or teat cups. Milk is taken off via the vacuum connections to the pumping vessel. A method of milking using the apparatus is also described.
    Type: Grant
    Filed: May 11, 1984
    Date of Patent: August 26, 1986
    Inventors: Walter G. Whittlestone, Douglas L. Wenham, James D. M. Foreman
  • Patent number: 4213341
    Abstract: A flow sampling apparatus has a body through which a central inlet conduit runs and a dome on the body. An inlet orifice on the inlet conduit discharges a fluid containing some liquid (milk) and the liquid flows evenly over the inner surface of the dome. One or more outlet ports are connected to a pair of intermediate vanes of a flow divider having at least four vanes and the liquid passing between the intermediate vanes is a representative sample of the whole flow over the inner surface of the dome. The sample is delivered to a sampling flask wither to the bottom of a flask which may be emptied by pressurizing the liquid in the flask or delivery may be by a flexible tube to a selected one of a series of flasks held in a removable magazine.
    Type: Grant
    Filed: December 5, 1978
    Date of Patent: July 22, 1980
    Assignee: AHI Operations Limited
    Inventor: Douglas L. Wenham