Patents by Inventor Roy C. Emmes

Roy C. Emmes 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).

  • Pneumatic time delay valve
    Patent number: 3990516
    Abstract: A valve body contains a coaxially slidably valve element with a seal member at the upstream end and a pair of differential area pistons at the other end. Fluid passage means direct fluid from the upstream end to a zone between the pistons to cause the pistons to seat the seal member. An orifice in the downstream, larger area piston bleeds fluid to an accumulator of preselected volume. Once the pressure forces on the large piston balance, the pressure force on the small piston unseat the seal member.
    Type: Grant
    Filed: October 8, 1975
    Date of Patent: November 9, 1976
    Assignee: The Ansul Company
    Inventors: Bruce C. Christensen, Roy C. Emmes