Patents by Inventor Tien Fa Wang

Tien Fa Wang 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).

  • Method of making steel couplers for joining concrete reinforcing bars
    Patent number: 7032286
    Abstract: A section of heat treated solid steel rod receives a phosphate solution treatment and is inserted into a blind cavity of a first die member within a cold forging press. A punch is forced axially into the rod section in successive steps to cold-forge a first bore and a tubular first end portion of a coupler body. A second end portion of the coupler body is also cold-forged in successive steps after treatments and is either reduced in diameter to receive external threads or is formed with a second bore. Each of the first and second bores receives an end portion of a concrete reinforcing bar after which the tubular end portion of body is compressed or swaged inwardly to secure the body to the reinforcing bar. The second bore may also be machined with internal threads for receiving the external threads on another coupler.
    Type: Grant
    Filed: May 22, 2003
    Date of Patent: April 25, 2006
    Assignee: Barsplice Products, Inc.
    Inventor: Tien Fa Wang
  • Method of making steel couplers for joining concrete reinforcing bars
    Patent number: 6571452
    Abstract: A section of heat treated solid steel rod receives a phosphate solution treatment and is inserted into a blind cavity of a first die member within a cold forging press. A punch is forced axially into the rod section in successive steps to cold-forge a first bore and a tubular first end portion of a coupler body. A second end portion of the coupler body is also cold-forged in successive steps after treatments and is either reduced in diameter to receive external threads or is formed with a second bore. Each of the first and second bores receives an end portion of a concrete reinforcing bar after which the tubular end portion of body is compressed or swaged inwardly to secure the body to the reinforcing bar. The second bore may also be machined with internal threads for receiving the external threads on another coupler.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: June 3, 2003
    Assignee: Barsplice Products, Inc.
    Inventor: Tien Fa Wang