Patents by Inventor Tun-I Chen

Tun-I Chen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6093985
    Abstract: A non-brush type low cost direct current motor for all electric bicycle, the motor is comprised of a housing and a lateral lid which form the internal receiving space for itself. A mandrel extends into two central holes respectively of the housing and the lateral lid, both ends of the mandrel are exposed for mounting two front fork tips of the bicycle. A sheet silicon steel core having a coil to be electrically activated is slipped over the mandrel. An annular inner surface is provided on the housing and allows mounting of a metal collar which can be adhered on the inner surface. Multiple magnets are arranged one by one to form an annular magnet layer. The external periphery of the sheet silicon steel core forms a gap with the annular magnet layer. When the coil is electrically activated, it automatically drives the bicycle. Thereby, a direct current motor of light weight and with low fault, low rubbing damage and low noise, and without gears and brush for a rechargeable low cost electric bicycle is provided.
    Type: Grant
    Filed: April 7, 1999
    Date of Patent: July 25, 2000
    Inventor: Tun-I Chen