Patents by Inventor John P. McKernan

John P. McKernan 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).

  • Upright/inverted sprayer
    Patent number: 5738252
    Abstract: A manually actuated liquid pump sprayer is capable of use in both upright and inverted positions without leakage through the vent port by the provision of an auxiliary inlet passage including an inlet port in the path of a slider valve, and a vent port likewise in the path of a slider valve. The vent port is open while the inlet port is closed while the slider valve in the upright attitude of the sprayer, while the converse is effected by the slider valve when operating the sprayer in an inverted position.
    Type: Grant
    Filed: April 28, 1997
    Date of Patent: April 14, 1998
    Assignee: Calmar Inc.
    Inventors: Joseph K. Dodd, John P. McKernan