Patents by Inventor Larry M. Tunks

Larry M. Tunks 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).

  • Self-priming pump
    Patent number: 4624627
    Abstract: A self-priming pump comprises a casing enclosing first and second impellers rotating on a common shaft. The first impeller in an associated impeller cavity pumps a liquid from an inlet to a first output port. The second impeller in an associated impeller cavity pumps the liquid from the inlet via an intake port to a second output port, the second impeller having a positive displacement for evacuating gas from the first impeller cavity. The first and second output ports are connected to an outlet with means provided for preventing reverse fluid flow into the first output port.
    Type: Grant
    Filed: February 22, 1985
    Date of Patent: November 25, 1986
    Inventor: Larry M. Tunks
  • Pressure indicator
    Patent number: 4527429
    Abstract: A pressure gauge is provided for use with a swimming pool filter system to indicate the condition of the swimming pool filter and advise when changing of the filter element is necessary. The pressure gauge is also useful to remove trapped air within the filter system and relief any vacuum that may be built up within the system by permitting bleed air to pass into and out of the filter system.
    Type: Grant
    Filed: December 21, 1983
    Date of Patent: July 9, 1985
    Assignee: Aladdin Equipment Company
    Inventors: H. E. Buddy Combest, Larry M. Tunks