Patents by Inventor Vinh L. Nguyen

Vinh L. Nguyen 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).

  • Washerless block heater
    Patent number: 5553578
    Abstract: A washerless block heater for automotive engines includes an externally threaded nipple surrounded by a sharp shoulder, which shoulder is provided with a pair of forwardly facing ribs. When the nipple is screwed into an engine block the ribs form a seal with the block wall to resist leakage from the block and to damp the transmission of vibrational forces from the block to the heater body which tend to unscrew the heater from the block.
    Type: Grant
    Filed: October 24, 1995
    Date of Patent: September 10, 1996
    Assignee: Pyroil Canada
    Inventor: Vinh L. Nguyen