Patents by Inventor Sai Wai Ip

Sai Wai Ip 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).

  • Bur and method of making same
    Patent number: 9358079
    Abstract: A bur for use with a machine comprises a head and a shank that are made of dissimilar materials with a joint between the head and the shank. The material of the head has a lower coefficient of thermal expansion than the material of the shank. The shank has a recess in one end. The head has a working surface and a projecting portion that cooperates with the recess. The joint is formed at an interface between the projecting portion and the recess whereby a portion of the head that includes the projecting portion is compressively stressed. The projecting portion may have a cone-like shape and the recess may have a cup-like shape. The material of the shank may be stainless steel and the material of the head may comprise metal carbide. The bur may be a dental bur.
    Type: Grant
    Filed: February 11, 2010
    Date of Patent: June 7, 2016
    Assignee: Sybron Canada LP
    Inventors: Steven Shuwen Sun, Allison Olegario, Keith Leslie Stewart, Sai Wai Ip
  • Bur and Method of Making Same
    Publication number: 20110195377
    Abstract: A bur for use with a machine comprises a head and a shank that are made of dissimilar materials with a joint between the head and the shank. The material of the head has a lower coefficient of thermal expansion than the material of the shank. The shank has a recess in one end. The head has a working surface and a projecting portion that cooperates with the recess. The joint is formed at an interface between the projecting portion and the recess whereby a portion of the head that includes the projecting portion is compressively stressed. The projecting portion may have a cone-like shape and the recess may have a cup-like shape. The material of the shank may be stainless steel and the material of the head may comprise metal carbide. The bur may be a dental bur.
    Type: Application
    Filed: February 11, 2010
    Publication date: August 11, 2011
    Applicant: SYBRON CANADA LP
    Inventors: Steven Shuwen Sun, Allison Olegario, Keith Leslie Stewart, Sai Wai Ip