Hybrid manhole cover
AssigneeNeenah Foundry Company
InventorHassan Shokouhi
Life of this patent
Estimating the term…
Abstract
A manhole cover includes a base with at least one opening therein to define a grate portion. A lip extends axially from the base along the outer circumference thereof, the base and the lip defining a recess. The manhole cover also comprises a composite portion comprising a composite material, the composite portion including a composite body defined by a top surface and a bottom surface. At least one aperture extends through the composite body, the top surface, and the bottom surface, the at least one aperture configured to receive at least one fastener, the at least one aperture configured to align with the at least one opening. The composite portion is configured to fit within the recess.
Claims20
A manhole cover, comprising:
- a base comprising:
- a grate portion, the grate portion defining at least one opening extending therethrough;
- and
- a lip integrally formed with and extending axially from the grate portion along an outer circumference thereof, the grate portion and the lip defining a recess therein;
- and
- a composite portion comprising a composite material, the composite portion comprising:
- a composite body including a top surface and a bottom surface;
- at least one aperture extending through the composite body, the top surface, and the bottom surface, the at least one aperture configured to receive at least one fastener, the at least one aperture configured to align with the at least one opening;
- wherein the composite portion is configured to fit within the recess.
A manhole cover, comprising:
- a base comprising
- a grate portion;
- and
- a lip integrally formed with and extending axially from the grate portion along an outer circumference thereof, the grate portion and the lip defining a recess therein;
- and
- a composite portion removably coupled to the base and comprising a composite material, the composite portion comprising:
- a composite body including a top surface and a bottom surface, the composite body defining at least one aperture extending entirely therethrough, the at least one aperture configured to receive at least one fastener configured to align with an opening in the grate portion;
- wherein the composite portion is configured to fit within the recess.
A manhole cover configured to couple with a manhole frame, the manhole cover comprising:
- a base configured to couple with the manhole frame, the base comprising:
- a grate portion defining a plurality of spaces therein, the grate portion further defining at least one opening extending therethrough;
- and
- a lip integrally formed with and extending axially from the grate portion along an outer circumference thereof, the base and the lip defining a recess therein;
- and
- a composite portion comprising a composite material, the composite portion comprising:
- a composite body including a top surface and a bottom surface;
- and
- at least one aperture extending through the composite body, the top surface, and the bottom surface, the at least one aperture configured to receive at least one fastener, the at least one aperture configured to align with the at least one opening;
- wherein the composite portion is configured to fit within the recess.
Dependencies are inferred from the claim text.