Drain pipe system
OwnerJohn A. Dragstreminventor
Life of this patent
Estimating the term…
Abstract
A system for clearing clogged drain pipes comprising a drain pipe section either straight or P-trap, having a closeable side inlet adjacent the upstream end of the pipe, means to connect the side inlet to a source of pressurized water, an anti-backflow device removably insertable in said side inlet, and a hinged flap valve inside the drain pipe hanging downwardly in its open position over the interior juncture of the side inlet and the drain pipe and movable upwardly to its closed position to prevent any upward flow through the drain pipe. This system is useful in all drains to remove obstructions in the drain pipe.
Claims16
In a drain pipe system having an upstream end and a downstream end the improvement which comprises a closeable side inlet pipe adjacent the upstream end thereof and having means to connect to a water source a flap valve having a flap pivotably connected adjacent said inlet pipe, said flap valve being positioned upstream of said side inlet pipe such that said flap hangs downwardly by the force of gravity with its surface normally convering a substantial portion of said side inlet opening, and a removably insertable anti-backflow device adapted to be inserted into said side inlet pipe and to close automatically to prevent any flow drainage from the drain pipe system outwardly through said side inlet pipe, said anti-backflow device being shaped such that when inserted through said side inlet pipe it will force said flap to be closed thereby closing the drain pipe system and when removed it will permit said flap to be open against the inside of and to open the said drain pipe system.
In a drain pipe system having a U-shaped pipe trap having an upstream and a downstream end, the improvement which comprises a closeable side inlet pipe having an opening in communication with said trap adjacent the upstream end thereof and having means to connect to a water source, an annular seat at the upstream end of said trap and a saddle-shaped flap pivotably connected adjacent said seat, said flap valve having a convex surface normally facing said inlet pipe and being positioned upstream of said side inlet pipe such that said flap hanges downwardly by the force of gravity with said convex surface resting against the inside of said drain pipe and covering a substantial portion of said side inlet pipe opening, and a removably insertable anti-backflow device adapted to be inserted into said side inlet pipe and to close automatically to prevent any flow drainage from said pipe trap outwardly through said side inlet pipe, said anti-backflow device being shaped such that when inserted through said side inlet pipe it will force said flap to be closed against said seat and when removed it will permit said flap to be open against the inside of said drain pipe.
Dependencies are inferred from the claim text.