Lined structure and liner
AssigneeStrickland Industries, Inc.
InventorJames K. Strickland
Life of this patent
Estimating the term…
Abstract
A plastic liner for protecting concrete manhole interior surfaces from corrosion wherein the liner includes provisions for creating a strong mechanical lock between the liner and the interior surfaces. A side of the liner which includes the provisions has a plurality of raised hollow projections with spaced sections. The mechanical lock is created when concrete is poured against the side of the liner with the projections. The concrete at least partially enters the hollow portions and fills spaces between the projection sections. The projections also intersect to enhance the mechanical lock by preventing bulging. Liner sections cover essentially all of the manhole interior surfaces. Forming a liner section by rotationally molding the plastic and cutting gaps into the projections is also disclosed.
Claims15
A lined structure of settable material having a plastic liner for lining and protecting a surface of the structure, said liner comprising:
- a first side;
- and
- a second side opposed from said first side, said second side having a plurality of spaced raised projections adapted to be embedded within the protected surface;
- wherein said raised projections are hollow;
- wherein the plastic material composing the liner is resistant to corrosion;
- and
- wherein each projection includes longitudinally spaced gaps and the settable material enters the gaps and at least partially fills the hollow raised projections.
A plastic liner for lining and protecting a surface, said liner comprising:
- a first side;
- and
- a second side opposed from said first side, said second side having a plurality of spaced ribs adapted to be embedded within the protected surface;
- wherein each rib includes cut out portions spaced along the rib for forming a mechanical lock between the liner and the surface, and each said rib includes raised ledges located below the cut out portions;
- and
- wherein the plastic material composing the liner is resistant to corrosion.
A plastic liner for lining and protecting a surface, said liner comprising:
- a first side;
- and
- a second side opposed from said first side, said second side having a plurality of spaced parallel first raised projections adapted to be embedded within the protected surface and a plurality of spaced parallel second raised projections adapted to be embedded within the protected surface;
- wherein both the plurality of first raised projections and the plurality of second projections are hollow;
- wherein said plurality of first raised projections intersect said plurality of second raised projections;
- and
- wherein the plastic material composing the liner is resistant to corrosion.
Dependencies are inferred from the claim text.