This technology has lead to development of such tools as the cordless vacuum cleaner, power drill, shrub trimmers, and grass shears. The three spokes on the wheel act like wings, making the bicycle very efficient for racing. These gloves and boots have heating elements that run on rechargeable batteries worn on the inside wrist of the gloves or embedded in the sole of the ski boot. This technology was adapted from a spacesuit design for the Apollo astronauts. The Fisher Space Pen was developed for use in space.
Most pens depend on gravity to make the ink flow into the ball point.
For this space pen, the ink cartridge contains pressured gas to push the ink toward the ball point. Also, it uses a special ink that works in very hot and very cold environments. These special football helmets use a padding of Temper Foam, a shock absorbing material first developed for use in aircraft seats. These helmets have three times the shock absorbing ability of previous types. These ski boots use accordion-like folds, similar to the design of space suits, to allow the boot to flex without distortion, yet still give support and control for precision skiing.