| 摘要 |
This invention relates to an adjustable fastening surface device with an integral releasable thread form. This device allows the adjustable anchoring of materials to hardened concrete or similar cold castable material with relatively low tensile and shear strength properties when contrasted with the compressive strength properties. The fastening device is cast or inserted into concrete or similar material prior to setting or curing, or can be inserted into cold castable material contained within a suitable void in any hard or impenetrable substrate. After the castable material has hardened, the fastening device can easily be rotated outwards from the initial cast or inserted position by means of a releasable thread form
|
