摘要:
Shoes(20) with various configurations of rollers (32) secured to one region(28) of their soles(24) for rolling, while leaving another sole region(26) exposed for walking. The rollers(32) are mounted to rotate about an axle(36) defining a primary axis of rotation extending at an angle of between about zero and 45 degrees to the walking direction, as viewed from above the shoe(20), for rolling sideways along a support surface. This provides a combined running-rolling method of locomotion, by running on the exposed sole surfaces, and then jumping into a 'surfing' stance for rolling. In some cases, the rollers are mounted on steerable truck assemblies. One particularly small truck assembly includes wedgeshaped bushings for steering compliance.
摘要:
An electrically conductive or semi-conductive polymeric material includes a metal salt dissolved in a polymer. The metal salt is complexed with the polymer, which is what provides the material with its conductive properties. The material has a resistivity of between 10 5 and 10 12 ohms-cm.
摘要:
An electrically conductive or semi-conductive polymeric material includes a metal salt dissolved in a polymer. The metal salt is complexed with the polymer, which is what provides the material with its conductive properties. The material has a resistivity of between 10 5 and 10 12 ohms-cm.
摘要:
An in-line wheeled skate which includes a rolling element (18) between the wheels (14, 16) that enables the skater to jump on a rail (20) and roll down the rail sideways, as in 'extreme skating' maneuvers, by placing the skate on the rail with the rolling element bearing upon the rail surface. Adjustable brakes provide control of the speed of sideways motion. The rolling element is provided, in some embodiments, as part of an attachment or lower structure (70, 70a, 70b) to be secured to an in-line skate.
摘要:
Disclosed is an in-line skate wheel (1) that includes: (a) a braking portion (4) including a high friction surface material having a hardness from about 75 to about 95 Shore A, and a coefficient of friction from about 0.45 to about 1.5; and (b) a skating portion (5) including a low friction surface material having a hardness from about 75 to about 95 Shore A, and a coefficient of friction from about 0.1 to about 0.45. The skating portion includes a higher proportion of low friction surface material than the braking portion. The wheel delivers variable traction in response to the angle of wheel contact with the ground, without sacrificing a smooth ride or wheel durability. Utilizing the variable traction of the wheel a skater can stop safely and reliably, using known iceskating maneuvers, wherein the wheel is turned away from the skater's direction of travel.
摘要:
A conductive quasi-solution useful for making a homogeneously conductive single-phase polyurethane, comprising a transition metal salt, a carrier solution, and a dispersing agent, wherein said conductive quasi-solution has a transition metal salt concentration between 10 and 30 % by weight, and methods of making thermoset and thermoplastic polyurethane polymers therewith.
摘要:
An electrically conductive or semi-conductive polymeric material includes a metal salt dissolved in a polymer. The metal salt is complexed with the polymer, which is what provides the material with its conductive properties. The material has a resistivity of between 10 5 and 10 12 ohms-cm.