Stackable riser resistant to soil movement
AssigneeUnited Concrete Products, Inc.
InventorNorman Gavin
Life of this patent
Estimating the term…
Abstract
A stackable riser having a substantially smooth outer surface has a first open end defined by an edge and a second open end defined by a pair of adjacent channels, so that the edge defining the first open end of a first riser can mate with one of the channels defining the second open end of a second riser. A detachable anchor tab extends radially from the outer surface about the circumference of the riser. A plurality of risers can be stacked one on top of another, with, for example, the bottommost riser embedded in concrete and the risers above it embedded in soil. Preferably, the anchor tab of the bottommost riser remains attached to the riser and the anchor tab of the risers above it is removed.
Claims55
A stackable riser forming a passageway there through, comprising:
- a continuous side wall having an open first end portion facing in a first direction, an open second end portion facing in a second direction opposite from said first direction, an intermediate portion interconnecting said first and second end portions, and an inner surface and an outer surface;
- a shoulder on the outer surface of said side wall, said shoulder facing in said first direction and being spaced from said first end portion, wherein said outer surface includes a recess between said shoulder and said first end portion, said shoulder and said recess being shaped to receive the side wall of the second end portion of another riser;
- a channel on said second end portion, said channel being defined by said side wall and a middle wall member attached to said side wall, said middle wall member being spaced from said inner surface of said side wall, and said channel being shaped to receive a first end portion of another riser;
- and
- an anchor tab detachably attached to said outer surface of said side wall, said anchor tab protruding outwardly away from the riser and being adapted for being embedded in surrounding material.
A stackable riser forming a passageway there through comprising:
- a continuous side wall having an open first end portion facing in a first direction, an open second end portion facing in a second direction opposite from said first direction, an intermediate portion interconnecting said first and second end portions, and an inner surface and an outer surface;
- a plurality of reinforcing ribs on said inner surface of said side wall, said reinforcing ribs being substantially parallel to said first and second directions, and said reinforcing ribs extending to said first end portion;
- a shoulder on the outer surface of said side wall, said shoulder facing in said first direction and being spaced from said first end portion, wherein said outer surface includes a recess between said shoulder and said first end portion, said shoulder and said recess being shaped to receive the side wall of the second end portion of another riser;
- a channel on said second end portion, said channel being defined by said side wall and a middle wall member attached to said side wall, said middle wall member being spaced from said inner surface of said side wall and defining a plurality of notches, said notches being shaped to allow the reinforcing ribs of another riser to pass through them, and said channel being shaped to receive a first end portion of another riser;
- and
- an anchor tab detachably attached to said outer surface of said side wall, said anchor tab protruding outwardly away from the riser and being adapted for being embedded in surrounding material.
A stackable riser section comprising:
- a sidewall defining an essentially smooth outer surface;
- an upper end of said sidewall adapted to mate with a lower end of the sidewall of another riser section;
- a lower end of said sidewall adapted to mate with the upper end of another riser section, wherein said essentially smooth outer surface of said sidewall includes a removable anchor tab extending therefrom.
A stackable riser section comprising:
- a sidewall;
- a first end of said sidewall adapted t mate with a lower end of the sidewall of another riser section;
- a second end of said sidewall adapted to mate with the upper end of another riser section,
- one of said ends is a channel end and includes walls defining a first and second channel, said first channel adapted to receive a first end of another riser section, and wherein said first end is adapted to be received in said first channel of another riser section, wherein a plurality of vertical members extend along an inner surface of said sidewall, said second channel of said riser section being adapted to receive the vertical members of another riser section.
Dependencies are inferred from the claim text.