초록 ▼

A tub box for receiving a drain trap is formed from two substantially identical plastic housing portions each including one or more round knockouts in one or more side walls of the housing portions and one or more edge flange knockouts in an edge flange of each housing portion and side walls in line

A tub box for receiving a drain trap is formed from two substantially identical plastic housing portions each including one or more round knockouts in one or more side walls of the housing portions and one or more edge flange knockouts in an edge flange of each housing portion and side walls in line with and terminating in close proximity to the respective round knockouts. Pull tabs on the round knockouts facilitate removal of the round knockouts from the housing portions and limit the amount of nesting of the housing portions inside one another when stacked for storage and shipment so the housing portions can easily be pulled apart when desired. A lip protrudes axially outwardly from the radial outer edge of the edge flange of each housing portion around one half only of the periphery of each edge flange for overlapping engagement with the outer edge of the edge flange of an other housing portion when the edge flanges of two housing portions are placed in engagement with one another.

대표청구항 ▼

[ What is claimed is:] [1.]1. A plastic housing portion used to make a tub box for receiving a drain trap comprising a plurality of continuous side walls forming a hollow enclosure open at one end and closed at an other end, said open end being surrounded by a radial outturned edge flange, at least

[ What is claimed is:] [1.]1. A plastic housing portion used to make a tub box for receiving a drain trap comprising a plurality of continuous side walls forming a hollow enclosure open at one end and closed at an other end, said open end being surrounded by a radial outturned edge flange, at least one round knockout in at least one of said side walls which when removed forms a round opening in said one side wall, and at least one edge flange knockout in said edge flange and said one side wall in line with said round knockout, said edge flange knockout terminating in close proximity to said round knockout whereby when said edge flange knockout is removed along with said round knockout, a knockout opening is formed in said one side wall that extends to the open end of said housing portion, said round knockout being formed by a thinner frangible section in said one side wall than said edge flange knockout to permit removal of said round knockout without removing said edge flange knockout.