Patents by Inventor J. Douglas Malcolm

J. Douglas Malcolm 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: 3938557
    Abstract: A fluidic device using a free jet in which a control nozzle or nozzles terminate within the emitter jet, is disclosed. Positioning the ends of the control nozzles within the emitter jet avoids jet distortion when acted upon by control fluid for deflection. In the preferred embodiment, geometric symmetry is provided, either with control nozzles in pairs disposed opposite to each other, or another control member, such as a rod, disposed opposite to each control nozzle. A receiver for preventing air or gas entrainment is also disclosed. The device provides high efficiency, low noise, and operates with low pressure.
    Type: Grant
    Filed: March 20, 1975
    Date of Patent: February 17, 1976
    Assignee: Canadian Patents and Development Limited
    Inventor: J. Douglas Malcolm