08925117 cites 547 patents.
Devices with one or more internal flexibility sipes, such as slits, to provide improved flexibility, improved cushioning to absorb shock and/or shear forces, and improved stability. The device includes at least a first bladder, chamber or compartment. An internal sipe is defined by at least a portion of two opposing internal surfaces that can move relative to each other in a sliding sideways motion, one of which surfaces is a surface of the first bladder, chamber or compartment. The device includes at least one attachment between the portions of said first and second surfaces defining at least one internal sipe, and at least one attachment is located at a central portion of the first bladder, chamber, or compartment. Siped devices can be used in apparel or clothing.