Patents Assigned to Yuyao Temperature Instrument Factory Co., Ltd.
  • Patent number: 7412071
    Abstract: The present invention relates to a low-inductance electromagnetic drive without driving magnetic flux circuit, which comprises a magnetic pole, a drive coil, an upper magnetic inductive board, a permanent magnet and a lower magnetic-inductive board. The magnetic pole is integrated with the lower magnetic-inductive board, and the permanent magnet is located between the upper magnetic-inductive board 4 and lower magnetic-inductive board 6. The drive coil is wrapped around the magnetic pole and is movable in the axial direction. The electromagnetic drive further comprises the fastening coil, and the fastening coil is fastened to a certain proper place of the magnetic flux circuit of the drive coil. Furthermore, the fastening coil is connected with the drive coil in opposite phase.
    Type: Grant
    Filed: June 14, 2004
    Date of Patent: August 12, 2008
    Assignee: Yuyao Temperature Instrument Factory Co., Ltd.
    Inventor: Qijun Wu