Patents by Inventor Yee tiat O. Co

Yee tiat O. Co 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).

  • Blown film tube diameter control apparatus
    Patent number: 4699580
    Abstract: A workpiece position control apparatus, specifically an apparatus for controlling the diameter of blown film tube, is disclosed. The apparatus includes at least one fluid nozzle, pressure sensing means for signalling the pressure of a fluid passing through the at least one nozzle and impinging on a workpiece when the workpiece is in a first position and for signalling the pressure of the impinging fluid when the workpiece is in at least one second position, and controlling means for adjusting the position of the workpiece in response to signals from the pressure sensing means.
    Type: Grant
    Filed: December 12, 1985
    Date of Patent: October 13, 1987
    Inventor: Yee tiat O. Co