Patents by Inventor John C. Shoemaker

John C. Shoemaker 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).

  • Vent valve
    Patent number: 3983891
    Abstract: This invention relates to a vent valve having an elongated housing. The housing has an inlet port positioned below an outlet port when the housing is in an upright position. A passage connects the inlet and outlet parts. The passage construction provides free passage of gaseous fluid but restricts momentary liquid flow or splash when the housing is in an upright position. A ball valve in the passage restricts liquid flow when the housing is tilted more than 90.degree. from its upright position.
    Type: Grant
    Filed: May 7, 1975
    Date of Patent: October 5, 1976
    Inventor: John C. Shoemaker