Patents by Inventor James F. Delahunty

James F. Delahunty 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 draining hose connection dual check valve back flow preventer
    Patent number: 5228470
    Abstract: In order to prevent contamination of a fluid source and to ensure drainage of a sill cock or the like, a detachable check valve back flow preventer for installation between a fluid inlet line and a fluid outlet line is provided. A housing with means for fastening the device to a fluid inlet line at one end of the housing and for connecting a fluid outlet line at the other end of the housing is provided. The housing has a central cavity within the housing. An inlet line drain valve is located within the housing between the central cavity and the fluid inlet line to provide for the drainage of fluid from the fluid inlet line to the fluid outlet line end of the housing when the fluid outlet line is not connected to the back flow preventer. A second valve is located within the housing between the central cavity and the fluid inlet line to control flow of fluids between the fluid inlet line and the central cavity.
    Type: Grant
    Filed: January 22, 1992
    Date of Patent: July 20, 1993
    Assignee: A. W. Cash Valve Manufacturing Corporation
    Inventors: John E. Lair, James F. Delahunty, Lawrence F. Luckenbill, Richard J. Holliday