Patents by Inventor Joseph W. T. Hui

Joseph W. T. Hui 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: 6315424
    Abstract: An underwater safety lighting device for lighting water beneath a surface (4) of the water in a swimming pool is provided. A water-tight light housing (1) is disposable beneath the surface (4) of the water in the pool and has a lens (5) removably attached to a front side (6) of the light housing (1), a light-emitting source (12) is secured within the light housing and a concaved light reflector (9) is secured within the light housing. The light-emitting source (12) is disposed above a conjugate axis (21) of the concave light reflector (9). An aperture (20) is disposed entirely in an upper one-half (21) of the light reflector (9) for receiving the light-emitting source (12). A control housing (2) is disposable out of the water of the pool and has a control device (26). An elongated connector (3) having a lower connector end (28) connects with a light housing connection portion (22) and an upper connector end (29) connects with a support of the pool.
    Type: Grant
    Filed: January 24, 2000
    Date of Patent: November 13, 2001
    Assignee: Smartpool Incorporated
    Inventor: Joseph W. T. Hui
  • Patent number: 5786761
    Abstract: A gate opening alarm for swimming pool fences and the like will sound an audible alarm when the gate is opened without first pressing a reset/pass switch button that is mounted out of children's reach. An alarm housing and a magnetically actuatable switch are mounted on either the gate or frame, with a permanent magnet mounted closely adjacent to the switch on the other gate component so that they will be separated when the gate is opened. A reset switch button is provided so that an adult may disable the alarm for a short period to pass though the gate. If the gate is not then closed, the alarm will sound. Opening the gate without pressing the reset button will cause the alarm to immediately sound. The switch is rearmed when the gate is closed after opening or after a short period if the reset button is pushed but the gate is not opened. If the gate is left opened, the alarm will sound for a period of typically 3 minutes, then will stop to check whether the gate has been closed.
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: July 28, 1998
    Inventor: Joseph W. T. Hui