Invention Grant
US07789607B2 Device for fixing an object to a tree 失效
用于将对象固定到树的设备

Device for fixing an object to a tree
Abstract:
A device fixes an object to a tree. The device includes an elongate body, one end of which is adapted for attachment to a tree. An object is slidably mounted on the elongate body. The device also includes a device for biasing the object towards the end of the body adapted for attachment to the tree. In use, pressure resulting from growth of the tree is transmitted to the object and pushes it along the elongate body against the bias and away from the tree.
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