Patent ID: 6860991
Filing Date: 2005-03-01
Classification: E03C

Abstract:
1. A drain trap clean-out system for preventing solids from entering wastewater lines and sewer gas backup while allowing liquid flow and convenient removal of solids comprising, in combination: a sink with a bottom opening and external male threads there around; an interior pipe having an upper end extending upwardly through the opening and a lower end and a central extent there between with an upper jam nut around the interior pipe adjacent to the upper end and internal female threads removably coupled to the external male threads of the sink and with a gasket between the upper jam nut and the sink and the interior pipe forming a compression fitting there between; an exterior pipe having an upper region receiving the central extent of the interior pipe and an enlarged lower region forming a ledge and receiving the lower end of the interior pipe, the lower region terminating in internal female threads with a plug having external male threads for removably coupling the plug with the exterior pipe; a T-shaped pipe having an upper portion coupled with respect to the interior pipe and a lower portion coupled with respect to the exterior pipe and a central portion adapted to be joined to a wastewater line, an adhesive attaching the exterior of the upper region of the exterior pipe to the interior of the lower portion of the T-shaped pipe; a sleeve having an exterior surface with external male threads being adjacent to the upper portion of the T-shaped pipe, a reducer bushing having an exterior surface adhesively attached to the interior surface of the T-shaped pipe at its upper portion and an exterior surface formed with internal female threads adjustably coupled to the external male threads of the sleeve, a lower jam nut above the sleeve with internal female threads removably coupled to the male threads of the sleeve and with a gasket between the lower jam nut and the sleeve and the interior pipe forming a compression fitting there between; a primary screen in a frusto-conical configuration with an enlarged lower end in contact with and supported by the plug and a smaller higher end lined up with and slightly below the lower end of the interior pipe; and a secondary screen in an annular configuration with an interior edge in contact with the exterior surface of the interior pipe adjacent to the lower end and with an exterior edge in contact with the interior surface of the enlarged lower portion of the exterior pipe in contact with the ledge whereby water passing from the sink will flow downwardly through the interior pipe and upwardly through the space between the interior and exterior pipes passing through one or more screens, then laterally through the central portion of the T-shaped pipe.