Multi-purpose lid for septic tank and associated riser
AssigneeAdvanced Drainage Systems, Inc.
InventorPaul R. Holbrook
Life of this patent
Estimating the term…
Abstract
A kit, and an assembly formed with components of the kit, comprises a fitting for the top of a septic tank or water tank, one or more frusto-conical rings shaped to interconnect with an identical ring to form an undulating wall riser that extends upwardly from the tank top fitting, and a lid. The lid is shaped for multi-purpose use: closing off the opening of either the large end or the small end of a ring/riser—whichever is uppermost, or closing off the fitting when there is no riser. Joints between the rings of the riser, and between a ring/riser and the fitting of a tank, are held together by latching tabs and/or screws. A fitting may be integral with a tank top.
Claims14
1-22. (canceled)
A lid configured for sealing a subsurface fluid tank, the lid comprising:
- a top configured to cover an opening of the tank;
- a circumscribing inner skirt extending downwardly from the top;
- a circumscribing outer skirt extending downwardly from the top, wherein a diameter of the circumscribing outer skirt is larger than a diameter of the circumscribing inner skirt;
- and
- a circumscribing middle skirt between the circumscribing inner skirt and the circumscribing outer skirt extending downwardly from the top, wherein the circumscribing middle skirt is configured to engage a gasket located in a fitting of the opening of the tank.
Dependencies are inferred from the claim text.