Abstract: This invention relates to an apparatus for harvesting both potential and kinetic energy stored in ocean waves. The ocean's surface waves can simultaneously cause a cylindrical float to move up and down as well as rotate. By incorporating this float into a mechanical rectifying assembly comprised of unidirectional drive gears, the float's vertical motion as well as its rotation can be converted into continuous, one-way rotation of a power output shaft to drive an electric generator. This arrangement achieves a wave energy conversion apparatus which is simple, has low technological, financial and maintenance requirements, and is scalable.

Abstract: This invention relates to improving the performance of the conventional vertical windmills. The following strategies are employed to accomplish the objectives: Modularizing the vane assembly structure to scale up the size and capacity of the windmill without weakening its structural integrity. Reducing the frictional loss by using buoyancy bearing. Generating lift to harvest more energy stored in the wind. Applying the basic mechanical skill and using off-the-shelf parts to reduce initial investment and maintenance cost.

Abstract: A removable sealing device is adapted to be mounted on a neck member of a liquid container to seal an outlet thereof. The device includes a seal membrane with a peripheral sealing surface which overlies a surrounding sealing edge surface formed with an edge wall of the neck member to close the outlet and which includes first and second sealing areas that are provided with first and second bonding members respectively with first and second bonding strengths. When the neck member is inverted to subject the seal membrane to the load of the liquid mass while the container is squeezed, the bonding between the second sealing area and the surrounding sealing edge surface remains, whereas the bonding between the first sealing area and the surrounding sealing edge surface is broken.