Patents Assigned to Phurness Pty. Ltd.
  • Patent number: 5426870
    Abstract: A shoe sole construction comprises a polyurethane outer sole having an electrical resistance of approximately 40 MOhms in a standard wet/dry test and an electrical resistance of approximately 20 MOhms in a standard wet/wet test in a test conducted according to British Standard 2050, and a rubber sole insert having an electrical resistance of approximately 1 MOhm positioned adjacent the outer sole. With this construction, static electricity in the sole insert is capable of discharging from the sole insert along a path of least resistance through the outer sole.
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: June 27, 1995
    Assignee: Phurness Pty. Ltd.
    Inventors: Andrew T. Purnell, Robert D. Purnell