Patents by Inventor Daniel E. Allen

Daniel E. Allen 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: 4550326
    Abstract: A nozzle plate for impulsive jet devices is proposed where the quality of ejected droplets is improved by means of additional non-emitting orifices. These orifices may act as fluid accumulators and tuned or untuned absorbers of pressure disturbances to optimize drop quality and reduce fluidic crosstalk between adjacent drop generators. The presence of these orifices permits additional degrees-of-freedom in the design of high-quality impulsive jet devices. Sufficient crosstalk reduction results that crosstalk reduction barriers can be eliminated.
    Type: Grant
    Filed: May 2, 1983
    Date of Patent: October 29, 1985
    Assignee: Hewlett-Packard Company
    Inventors: Ross R. Allen, Daniel E. Allen