Slab on grade chair
OwnerG. Douglas Hartzheiminventor
Life of this patent
Estimating the term…
Abstract
A chair for supporting and spacing reinforcement bars having a hollow-conical body for stackability, a planar base for support, an aperture allowing concrete to flow into and around the chair, and notches in the upper surface of the chair to retain the bars in the desired position.
Claims25
A chair for supporting and spacing reinforcement members, comprising:
- a substantially hollow-conical body having a longitudinal axis, a continuous wall portion defining an upper opening, a lower end, an inner surface, an outer surface, and a support portion disposed between said continuous wall portion and said lower end, said support portion defining a side aperture, said support portion having an inner and an outer surface having substantially the same slope;
- at least one notch in said continuous wail portion;
- and
- at least one foot portion connected to said body at said lower end, said at least one foot portion defining at least a portion of a lower opening which is larger than said upper opening, said foot portion extending outwardly from said longitudinal axis.
A chair for supporting and spacing reinforcement members comprising:
- a substantially hollow-conical body having a longitudinal axis, a continuous wall portion defining an upper opening and a lower end;
- a plurality of support legs disposed between said continuous wall portion and said lower end defining a plurality of apertures disposed between said support legs, said support legs each having a leg curvature and said wall portion having a wall curvature such that said leg curvature is greater than said wall curvature;
- a plurality of notches in said continuous wall portion;
- and
- a radially outward extending base connected to said body at said lower ends, said base defining a generally circular lower opening larger than said upper opening.
Two or more chairs which support and space reinforcement members, the chairs stack for storage or transportation, comprising:
- a first chair having a substantially hollow-conical body, said body having an upper opening and a plurality of support legs, said support legs attached to a radially outward extending base, said base having a central opening, said support legs having an inner wall, an outer wall and a leg curvature, said inner wall and said outer wall having substantially the same slope;
- and
- a second chair having a substantially hollow-conical body, said body having an upper opening and a plurality of support legs, said support legs attached to a radially outward extending base, said base having a central opening, said support legs having an inner wall, an outer wall and a leg curvature, said inner wall and said outer wall having substantially the same slope, wherein said second chair is substantially disposed inside said first chair when said first and second support legs are aligned.
A combination for holding a plurality of chairs used to support reinforcement members, comprising:
- a container having an inner wall, a first end and a second end;
- and
- a plurality of generally identical chairs, each chair comprising a hollow-conical body having a longitudinal axis, an upper end, a lower end, said chair including a radially outward extending base connected to said body at said lower end, said base having an outer perimeter and an inner perimeter, said inner perimeter defining a circular lower opening larger than said upper end, said chairs being stacked together such that said outer perimeter of said stacked chairs is configured to fit within said inner wall of said container, said chairs being stacked together such that the bases of adjacent chairs are separated by a gap;
- wherein said plurality of chairs are stacked in a single stack such that each longitudinal axis of each chair is coincident and the shape of the inner wall of the container is generally shaped like the outer perimeters of said stack, and said lower end of said container including an aperture configured to allow removal of one of said plurality of chairs from said container.
A method for handling a plurality of chairs used to support reinforcement members within a tubular container, each chair having a longitudinal chair axis and a planar base perpendicular to said chair axis, said base being the widest part of each chair, said tubular container having a first end, a second end, a longitudinal tube axis, said second end of said tubular container including an opening sized to allow one of said plurality of chairs to be removed from said container, said method comprising:
- placing said plurality of chairs in a single stack such that each longitudinal axis of each chair is coincident;
- storing said stack substantially within said tubular container;
- transporting said tubular container proximate a location requiring a chair;
- removing one of said plurality of chairs from said tubular container;
- and
- placing said chair at said location.
Dependencies are inferred from the claim text.