Concrete slab dowel system and method for making and using same
First Claim
1. A concrete dowel slab joint system, comprising:
- a sleeve assembly for receiving and maintaining a dowel bar therewithin so that the dowel bar does not transmit substantial shear stresses to the concrete during the contraction and expansion of the concrete, the sleeve assembly comprising (a) an elongate sleeve body including an outer surface having a tapered configuration and defining a hollow interior compartment, and (b) at least one end section defining an aperture;
the dowel bar located within said hollow interior compartment for maintaining adjacent sections of concrete in alignment during contraction and expansion of the concrete, and for transferring shear stresses and bending moments across a joint formed between adjacent concrete slabs, the dowel bar moving in a lateral and/or longitudinal path within the hollow interior compartment and exerting interactive forces in response to the expansion and contraction of the concrete, the tapered configuration of said elongate sleeve body providing supplemental structural support for the dowel bar which is sufficient to overcome the effect caused if concrete joint separation skews the original position of the dowel bar; and
at least one bracket member located on an underlying surface for supporting said sleeve assembly and said dowel bar above said underlying surface, each bracket member comprising at least one connection element which is engagingly insertable into each said aperture, each said bracket member and sleeve assembly being movable with respect to each other when shrinkage of the concrete occurs.
0 Assignments
0 Petitions
Accused Products
Abstract
A sleeve assembly system, a concrete dowel slab joint system, a method for maintaining adjacent sections of concrete in alignment during contraction and expansion of the concrete and for transferring shear stresses and bending moments across a joint formed between adjacent concrete slabs, and a concrete slab including a plurality of concrete dowel slab joint systems are provided. The concrete dowel slab joint system comprises the sleeve assembly for receiving and maintaining the dowel bar therewithin. The sleeve assembly is designed so that the dowel bar does not transmit substantial shear stresses to the concrete during the contraction and expansion of the concrete. A pair of bracket members, located on an underlying surface, support the sleeve assembly and the dowel bar above the underlying surface,
-
Citations
29 Claims
-
1. A concrete dowel slab joint system, comprising:
-
a sleeve assembly for receiving and maintaining a dowel bar therewithin so that the dowel bar does not transmit substantial shear stresses to the concrete during the contraction and expansion of the concrete, the sleeve assembly comprising (a) an elongate sleeve body including an outer surface having a tapered configuration and defining a hollow interior compartment, and (b) at least one end section defining an aperture;
the dowel bar located within said hollow interior compartment for maintaining adjacent sections of concrete in alignment during contraction and expansion of the concrete, and for transferring shear stresses and bending moments across a joint formed between adjacent concrete slabs, the dowel bar moving in a lateral and/or longitudinal path within the hollow interior compartment and exerting interactive forces in response to the expansion and contraction of the concrete, the tapered configuration of said elongate sleeve body providing supplemental structural support for the dowel bar which is sufficient to overcome the effect caused if concrete joint separation skews the original position of the dowel bar; and
at least one bracket member located on an underlying surface for supporting said sleeve assembly and said dowel bar above said underlying surface, each bracket member comprising at least one connection element which is engagingly insertable into each said aperture, each said bracket member and sleeve assembly being movable with respect to each other when shrinkage of the concrete occurs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 22, 24, 26, 28)
-
-
11. A sleeve assembly system which comprises
a sleeve assembly for receiving and maintaining the dowel bar therewithin so that a dowel bar does not transmit substantial shear stresses to the concrete during the contraction and expansion of the concrete, the sleeve assembly comprising (a) an elongate sleeve body including an outer surface having a tapered configuration and defining a hollow interior compartment, and (b) at least one end section, each said end section defining an aperture for receiving an engagingly insertable connection element of a bracket member, each said bracket member and sleeve assembly being movable with respect to each other when shrinkage of the concrete occurs, said bracket member being located on an underlying surface for supporting said sleeve assembly system above said underlying surface; - and
a dowel bar located within said hollow interior compartment for maintaining adjacent sections of concrete in alignment during contraction and expansion of the concrete, and for transferring shear stresses and bending moments across a joint formed between adjacent concrete slabs, the dowel bar moving in a lateral and/or longitudinal path within the hollow interior compartment and exerting interactive forces in response to the expansion and contraction of the concrete, said dowel bar being capable of movement to a position which is substantially non-parallel with respect to an original position of the dowel bar when the concrete dowel slab joint system was originally installed. - View Dependent Claims (23, 25, 27, 29)
- and
-
12. A method for maintaining adjacent sections of concrete in alignment during contraction and expansion of the concrete and for transferring shear stresses and bending moments across a joint formed between adjacent concrete slabs, which comprises:
-
providing a sleeve assembly for receiving and maintaining the dowel bar therewithin so that a dowel bar does not transmit substantial shear stresses to the concrete during the contraction and expansion of the concrete, the sleeve assembly comprising (a) an elongate sleeve body including an outer surface having a tapered configuration and defining a hollow interior compartment, and (b) at least one end section, each said end section defining an aperture;
providing a dowel bar;
locating the dowel bar within said hollow interior compartment for maintaining adjacent sections of concrete in alignment during contraction and expansion of the concrete, and for transferring shear stresses and bending moments across a joint formed between adjacent concrete slabs, the dowel bar moving in a lateral and/or longitudinal path within the hollow interior compartment and exerting interactive forces in response to the expansion and contraction of the concrete so as not to transmit substantial shear stresses to the concrete during the contraction and expansion of the concrete, said dowel bar being capable of movement to a position which is substantially non-parallel with respect to an original position of the dowel bar when the concrete dowel slab joint system was originally installed;
providing at least one bracket member;
locating each said bracket member on an underlying surface, each bracket member comprising at least one connection element; and
engagingly inserting each said connection element into each said aperture for supporting said sleeve assembly and dowel bar above said underlying surface, each said bracket member and sleeve assembly being movable with respect to each other when shrinkage of the concrete occurs. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A concrete slab including a plurality of concrete dowel slab joint systems, each concrete dowel slab joint system comprising
a sleeve assembly for receiving and maintaining a dowel bar therewithin so that the dowel bar does not transmit substantial shear stresses to the concrete during the contraction and expansion of the concrete, the sleeve assembly comprising (a) an elongate sleeve body including an outer surface having a tapered configuration and defining a hollow interior compartment, and (b) at least one end section defining an aperture; -
the dowel bar located within said hollow interior compartment for maintaining adjacent sections of concrete in alignment during contraction and expansion of the concrete, and for transferring shear stresses and bending moments across a joint formed between adjacent concrete slabs, the dowel bar moving in a lateral and/or longitudinal path within the hollow interior compartment and exerting interactive forces in response to the expansion and contraction of the concrete, and wherein said dowel bar is capable of movement to a position which is substantially non-parallel with respect to an original position of the dowel bar when the concrete dowel slab joint system was originally installed, and wherein said dowel bar is capable of movement to a position which is substantially non-parallel with the position of a dowel bar in any other concrete dowel slab joint system located within said concrete slab; and
at least one bracket member located on an underlying surface for supporting said sleeve assembly and said dowel bar above said underlying surface, each bracket member comprising at least one connection element which is engagingly insertable into each said aperture, each said bracket member and sleeve assembly being movable with respect to each other when shrinkage of the concrete occurs.
-
Specification