Patents by Inventor Hazel Ann Whyte Lewry

Hazel Ann Whyte Lewry 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).

  • Patent number: 8997474
    Abstract: A differential fluid pressure energy conversion system includes a valve (V1) for regulating an input from a pressure source to define a fluid flow; and a lower piston chamber (LPC) in fluid communication with an output of V1, the LPC disposed about a central vertical axis of the system; Further included is a double acting reciprocatable piston (DAP) having an integral lower portion (PI) and an integral upper integral portion (P2), each portion having a bottom radial surface area, the radial surface area of P1 greater than that of P2, an outer peripheral edge of the P1 in fluid-tight slidable continuous contact with an inner complemental surface of LPC, DAP further including an elongate axial channel, co-axial with the vertical axis of the system, the channel extending an entire axial length of the DAP.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: April 7, 2015
    Inventors: William Lewry, Hazel Ann Whyte Lewry
  • Publication number: 20110289910
    Abstract: A differential fluid pressure energy conversion system includes a valve (V1) for regulating an input from a pressure source to define a fluid flow; and a lower piston chamber (LPC) in fluid communication with an output of V1, the LPC disposed about a central vertical axis of the system; Further included is a double acting reciprocatable piston (DAP) having an integral lower portion (P1) and an integral upper integral portion (P2), each portion having a bottom radial surface area, the radial surface area of P1 greater than that of P2, an outer peripheral edge of the P1 in fluid-tight slidable continuous contact with an inner complemental surface of LPC, DAP further including an elongate axial channel, co-axial with the vertical axis of the system, the channel extending an entire axial length of the DAP.
    Type: Application
    Filed: February 23, 2011
    Publication date: December 1, 2011
    Inventors: William Lewry, Hazel Ann Whyte Lewry