Resources Contact Us Home
Ball roller

Image Number 3 for United States Patent #6896414.

The ball roller according to the present invention has a unique shape so that it can be handled just as easily as a conventional ball while being endurable against high load as is a roller. The ball roller comprises a rolling portion having an arcuate surface, and two spherical end portions spherically protruding from both ends of the rolling portion. The rolling portion has a radius of curvature larger than that of each of the spherical end portions, curvature centers of the spherical end portions are located on the rotational axis of the rolling portion. In another embodiment of the present invention, a ratio between the maximum diameter d of the rolling portion and the distance W between the two apexes of the spherical end portions falls within a rage of approximately 80%.+-.17%.

  Recently Added Patents
Integrated circuit packaging system with interconnects and method of manufacture thereof
Systems and methods for adaptive error thresholds or adaptive modulation schemes based on atmospheric conditions
Call admission control method and system
LED light source lamp having drive circuit arranged in outer periphery of LED light source
Solution based precursors
System and method for controlling a wireless device
Packet transmission system and fault recovery method
  Randomly Featured Patents
Structure of supporting a stepping motor
Percutaneous fixation of hollow organs
Interactive exercise pad system
Access stratum manager
Lubrication of a pitch angle adjusting device of a rotor blade of a windmill
Method and arrangement for routing pseudo-wire encapsulated packets
Article for suppressing foam and method for suppressing foam
Scan-conversion process and processor for converting a graphic primitive to a pixel map
Transport systems and methods incorporating absolute time references and selective buildout delays
Methods and apparatus for confinement of a plasma etch region for precision shaping of surfaces of substances and films