Patents by Inventor Cha Y. Choe

Cha Y. Choe 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).

  • Stabilized tap with air release
    Patent number: 5033919
    Abstract: The invention comprises means to align and stabilize taps prior to the commencement of the actual cutting of the threads and to release air while tapping. On the tap a constant diameter stabilizer is placed before the tapered chamfer section of the tap. This front portion is of a diameter slightly less than the inner diameter of the hole to be tapped. The front portion is inserted into the hole and acts to align the tap and avoid cross-threading of the tapped hole. To release air trapped in a blind hole, the flutes of the tap are extended through the stabilizer portion.
    Type: Grant
    Filed: July 26, 1990
    Date of Patent: July 23, 1991
    Inventor: Cha Y. Choe