Patents by Inventor Walter H. Costello

Walter H. Costello 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).

  • Valveless shut-off and transfer device
    Patent number: 4612959
    Abstract: A valveless gas shut-off and transfer device has a looped conduit with a solder-like material in the loop. This eutectic material solidifies below its critical temperature to block the conduit and is liquefied above its critical temperature to allow passage of gas through the conduit. Baffles on the outlet retain the liquefied solder when gas is passing through the device. The liquid solder flows back to the loop when pressures at the inlet and outlet are equalized. When the solder solidifies, the device is again blocked.
    Type: Grant
    Filed: May 7, 1985
    Date of Patent: September 23, 1986
    Assignee: Mobil Oil Corporation
    Inventor: Walter H. Costello