| 摘要 |
A tie-down anchor for securing an object to a plank deck structure having first and second members spaced apart by a gap. The tie-down anchor includes a shaft assembly and a spring assembly. The shaft assembly includes (a) a longitudinally extending rod, (b) an anchor portion located at a first end of the longitudinally extending rod, and (c) an attachment portion at a second end of the longitudinally extending rod. The anchor portion may include a bar portion sized and shaped for engaging a lower side of the first or second member, or both. The spring assembly includes a compression spring, an upper spring retainer, and a lower spring retainer. The spring assembly is adjustable along the longitudinally extending rod, between the anchor portion and the attachment portion. By engaging the lower spring retainer with the upper side of the first member or the second member, or both, and compressing the compression spring, the bar portion of the anchor portion is pushed below the plank deck structure. Then, the shaft assembly is rotated and subsequently released. Upon installation, the tie-down anchor securely engages the plank deck, by and between the bar portion and the lower spring retainer. |
| 主权项 |
1. A tie-down anchor for securing an object to a structure, the structure having adjacent first and second members of thickness T1 and T2, respectively, the first and second members spaced apart by a gap of width W1, said tie-down anchor comprising:
a shaft assembly, the shaft assembly comprising (a) a longitudinally extending rod having a first end and a second end, (b) an anchor portion located at said first end, said anchor portion having a bar portion sized and shaped for engaging a lower side of at least the first member, and (c) an attachment portion located at said second end, said first end of said longitudinally extending rod and said anchor portion each having a maximum width less than or about equal to gap width W1; a spring assembly, said spring assembly comprising (a) a compression spring, (b) an upper spring retainer, and (c) a lower spring retainer, said upper spring retainer comprising a first inner edge defining a first shaft receiving aperture, and said lower spring retainer comprising a second inner edge defining a second shaft receiving aperture, said spring assembly longitudinally adjustable and located around said longitudinally extending rod and located between said anchor portion and said attachment portion, said lower spring retainer comprising a bottom surface for engaging an upper side of at least said first member; wherein by engaging said lower spring retainer with the upper side of at least the first member and compressing said compression spring, the bar portion of the anchor portion may be pushed below the first member, and then the shaft assembly (a) rotated, and (b) released, so that said tie-down anchor is placed in an installed configuration where it securely engages at least the first member, by and between (1) the bar portion at the lower side, and (2) the lower spring retainer at the upper side. |
