Constant-Tension Lumber Wedge

Constant-Tension Lumber Wedge Inventor: Kirk Lim Sang This invention is an active logging tool designed to stop dangerous tree-cutting accidents by preventing heavy tree trunks from rocking backward and pinching chainsaw blades. The device works completely on stored mechanical energy without needing electrical wires, batteries, or manual pumps The tool works by housing a strong, compressed shape-memory spring core inside a heavy-duty outer shell. When a logger drives the wedge into a tree cut with an axe, the massive weight of the trunk compresses the internal spring, storing immense pushing energy. If the tree shifts backward even a tiny bit from wind or saw vibrations, the compressed spring instantly forces sharp steel barbs outward through the body. These teeth bite deep into the raw wood fibers, locking the tool solidly inside the trunk so it cannot pop out This creation helps humanity by greatly improving safety for arborists, utility workers, and emergency crews clearing fallen trees after storms; it prevents painful logging injuries, protects expensive cutting tools from damage, and ensures trees fall safely in the exact planned direction