| 摘要 |
Easy to attach and detach blades for overhead ceiling fans. One version has a fan blade with keyhole slots that fit over flat topped fasteners on a mounting arm. Pulling the blade away from the arm locks the slots to the fasteners. A similar second version has a decorative bottom cover having snappable tapered protrusions which attach through the keyholes and into mateable through-holes in the mounting arm. The third version has a protruding end portion of the blade that fits into a slot in the mounting arm where spring loaded pistons press into grooves in the protrusion end portion of the blade. Latching handles allow users to manually move the pistons. A fourth version has a slot in the blade which fits about a mateable housing in the mounting arm where opposing spring loaded pistons press into interior wall grooves in the slot of the blade. A fifth version has the blade with slots fit over the end of the mounting arm so that pulling the blade from the mounting arm causes spring loaded piston to interlock into a interior wall groove in the slot of the blade. A sixth version uses rubber/fiber gaskets/grommets that wrap about flat headed fasteners that connect the blades to the mounting arms. Each gasket has flattened washers on opposite ends of a hollow cylinder. One washer abuts against the outside of the blade and the other washer is sandwiched between the blade and the mounting arm in order to reduce contact between at least the blade and mounting arm, allowing for enhanced vibration isolation when the fan is in operation, and a more secure fit between the components.
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