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US 9,435,435 B2Granted
Universal secondary safety system including a riser and screen
AssigneePolylok Corporation
InventorPeter W. Gavin
Life of this patent
Estimating the term…
Abstract
Systems for providing universally installable secondary safety systems for use, in one embodiment, with a riser for a septic tank are disclosed. In some embodiments, the system includes the following: a riser extending from a system of interest located underground, a retainer ring installed within said riser, and a safety screen to prevent access to the underground system and lower portions of the riser from above.
Claims1
A septic tank riser safety system for preventing accidental entry to a riser joined with and extending away from a septic tank, comprising:
- an expandable retainer ring including top and exterior side surfaces and first and second ends, said exterior side surface joined with interior walls of said riser;
- a safety screen positioned on and joined with said top surface of said expandable retainer ring wherein said safety screen includes one or more holes sized to receive fasteners for fastening said safety screen to said top surface, said safety screen having an upper surface that is generally convex;
- an adjustable ratchet mechanism included on said expandable retainer ring for increasing and decreasing a diameter of said expandable retainer ring and releasably joining said first and second ends;
- and
- wherein said exterior side surface of said expandable retainer ring includes one or more pre-drilled holes sized to receive fasteners for fastening said expandable retainer ring to interior walls of a riser;
- and
- wherein said adjustable ratchet mechanism allows the diameter of the retainer ring to increase by about at least about 1% to about 10%.
4 more elements
Dependencies are inferred from the claim text.