Patent ID: 8114792

Claim:
A three-dimensional woven hollow layer-connecting fabric comprising: an upper layer-surface formed by crossing a pair of upper ground warp yarns with a row of upper weft yarns, a lower layer-surface formed by crossing a pair of lower ground warp yarns with a row of lower weft yarns, and a first and a second poil warps concurrently crossed with the upper weft yarns and the lower weft yarns to connect the upper layer-surface and the lower layer-surface, such that: during the process of transiting from the upper layer-surface to the lower layer-surface, the first poil warp, after being crossed with one of the row of upper weft yarns, is crossed with one of the row of the lower weft yarns, which corresponds to said one of the row of upper weft yarns in the same vertical section, and during the process of transiting from the lower layer-surface to the upper layer-surface, the second poil warp, after being crossed with said one of the row of the lower weft yarn, is crossed with said one of the row of upper weft yarns in the same vertical section, thereby forming a symmetrical spacial configuration, wherein the spacial walking direction of the first poil warp from the upper layer-surface to the lower layer-surface and the spacial walking direction of the second poil warp from the lower layer-surface to the upper layer-surface are in a backward direction to the weft-inserting direction of the fabric.