Patents by Inventor Edwin R. Langill

Edwin R. Langill 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).

  • Method and apparatus for maintaining level of water in above-ground swimming pools
    Patent number: 5358003
    Abstract: The water level of an above-ground swimming pool is maintained at a predetermined level by a small tank attached to the edge of the pool. The tank bottom has an aperture for a conduit to the pool through the side wall thereof, whereby the level of the water in the tank is the same as the level of the water in the pool. The pressure sensor switch is designed to open when the water level in the pool falls below a predetermined amount, and to close when the water level is restored thereto. The pressure sensor switch is activated by the level of the water in the tank, but when open delivers water from the house line directly to the pool.
    Type: Grant
    Filed: October 15, 1993
    Date of Patent: October 25, 1994
    Inventor: Edwin R. Langill
  • Method and apparatus for maintaining level of water in above-ground swimming pools
    Patent number: 5253374
    Abstract: The water level of an above-ground swimming pool is maintained at a predetermined level by a small tank attached to the edge of the pool. The conduit is comprised of a Y-connection fitting having a stem and two arm portions. An eye is attached to the fitting by an eye housing and eye cap. A nut is provided for securing the fitting to a pool sidewall. The fitting contains radial apertures and longitudinal passageways which permit water to flow into, and out of, the pool simultaneously.
    Type: Grant
    Filed: October 2, 1992
    Date of Patent: October 19, 1993
    Inventor: Edwin R. Langill
  • Method and apparatus for maintaining level of water in above-ground swimming pools
    Patent number: 5154205
    Abstract: The water level of an above-ground swimming pool is maintained at a predetermined level by a small tank attached to the edge of the pool. The tank bottom has an aperture for a conduit to the pool through the side wall thereof, whereby the level of the water in the tank is the same as the level of the water in the pool. The pressure sensor switch is designed to open when the water level in the pool falls below a predetermined amount, and to close when the water level is restored thereto. The pressure sensor switch is activated by the level of the water in the tank, but when open delivers water from the house line directly to the pool.
    Type: Grant
    Filed: January 3, 1992
    Date of Patent: October 13, 1992
    Inventor: Edwin R. Langill