Combination sink trap access port filtration device

Claim 1

A combination sink trap access port filtration device comprising: (a) a trap pipe having a straight portion terminating in a curved portion underlying said straight portion, (b) a downwardly extending tubular extension member connected to and communicating at its inner end with the trap pipe at the juncture of the straight portion and the curved portion, (c) the longitudinal axis of said tubular extension member being at an angle of about 135° from the longitudinal axis of said straight portion, (d) a screen extending the diameter and the length of the tubular extension and the diameter of the trap pipe at said juncture, (e) means in said tubular extension member for releasably mounting said screen comprising opposed channel formations on the inner surface of said extension in which the opposed edges of the screen are positioned, (f) said screen carrying a flat solid blocking member having the same formation and area of said screen, (g) said blocking member extending at a right angle to said screen for alternative insertion into said opposed channel formations, (h) said tubular extension, screen and blocking member forming a pocket wherein material caught by said screen and blocking member will build up in said tubular extension without interrupting fluid flow through said trap, and (i) a cap for the outer end of said tubular extension.