Stackable riser for on-site waste and drainage systems
AssigneeTuf-Tite, Inc.
InventorTheodore W. Meyers
Life of this patent
Estimating the term…
Abstract
A plastic stackable riser for providing a grade level access for underground components such as septic tanks, distribution boxes, and drop boxes, including a cylindrical side wall having a top free edge and a bottom edge. The top free edge defines a first end opening and the second bottom edge is connected to a generally inverted U-shaped connecting member which defines a channel shaped to receive the first free edge portion of an adjacent stackable riser. In use, a plurality of stackable risers are interlocked together so that the side walls all extend along common vertical axes to the underground component and provide a gas-tight, liquid-tight column above the underground component.
Claims32
A stackable riser comprising:
- a cylindrical side wall having outer and inner surfaces and having a first free edge portion which defines a first end opening and having a second edge portion;
- and
- a generally inverted U-shaped connecting member extending from said second edge portion of said side wall and defining an oppositely-facing second end opening, said U-shaped connecting member including a transverse intermediate portion and first and second generally perpendicular dependent legs which define a channel between said dependent legs which is shaped to receive a first free edge portion of another riser;
- and
- a plurality of terminal ends on said inner surface, intermediate said first end opening and said second edge portion, and each of said terminal ends positioned a predetermined distance away from a tip of said first free edge portion of said cylindrical side wall.
A stackable riser comprising:
- a cylindrical side wall having outer and inner surfaces in which said outer surface of said cylindrical side wall is provided with a plurality of terminal ends positioned a predetermined distance away from a first free edge portion of said cylindrical side wall.
A stackable riser combination comprising:
- a plurality of stackable risers which are interlocked together to form a vertical passageway, each of said risers comprising:
- a cylindrical side wall having outer and inner surfaces and having first and second edge portions, said inner surface of said side wall defining a passageway extending between said first and second edge portions;
- and
- a U-shaped connecting member extending from said second edge portion of said side wall and including a transverse intermediate portion and first and second generally perpendicular dependent legs which define a channel between said dependent legs which is shaped to receive a first edge portion of another riser;
- said plurality of stackable risers including at least first and second risers in which said first edge portion of said first riser is inserted into said U-shaped connecting member of said second riser.
A stackable riser comprising:
- a cylindrical side wall having outer and inner surfaces and having a first free edge portion which defines a first end opening and having a second edge portion;
- and
- a generally inverted U-shaped connecting member extending from said second edge portion of said side wall and defining an oppositely-facing second end opening, said U-shaped connecting member including a transverse intermediate portion and first and second generally perpendicular dependent legs which define a channel between said dependent legs which is shaped to receive a first free edge portion of another riser;
- and
- means provided on said inner surface for supporting a second edge portion of another riser.
Dependencies are inferred from the claim text.