Patents by Inventor Seung Pun Ho

Seung Pun Ho 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).

  • Electric motor
    Patent number: 6870296
    Abstract: A miniature PMDC motor has a wound rotor 15 comprising a rotor core 16 and a commutator 17 mounted on a shaft 14. A cooling fan 20 is directly mounted onto the commutator 17 by use of a mechanical snap-fit type connection. Projections 29 on the commutator mate with recesses in the fan 20 to prevent relative rotational movement and detents including resilient fingers 23 and projection surfaces 34 hold the fan axially.
    Type: Grant
    Filed: July 31, 2003
    Date of Patent: March 22, 2005
    Assignee: Johnson Electric S.A.
    Inventors: Seung Pun Ho, Chi Wai Derek Yuen
  • Electric motor
    Publication number: 20040027028
    Abstract: A miniature PMDC motor has a wound rotor 15 comprising a rotor core 16 and a commutator 17 mounted on a shaft 14. A cooling fan 20 is directly mounted onto the commutator 17 by use of a mechanical snap-fit type connection. Projections 29 on the commutator mate with recesses in the fan 20 to prevent relative rotational movement and detents including resilient fingers 23 and projection surfaces 34 hold the fan axially.
    Type: Application
    Filed: July 31, 2003
    Publication date: February 12, 2004
    Inventors: Seung Pun Ho, Chi Wai Derek Yuen