Patents by Inventor Walter W. Brennan

Walter W. Brennan 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).

  • Patent number: 4251240
    Abstract: A device for separating air entrained in, and associated with, liquid being pumped. The device comprises a tank member communicating with the intake chamber of a liquid pump and with a vacuum pump. Disposed within the tank member is an open container member having a liquid conduit connected with the intake chamber of the liquid pump. Integrally connected with the top of the tank member is a baffle member which extends downwardly into the container member in such manner that liquid flowing into the container from the tank member flows downwardly between the inner surface of the container and the outer surface of the baffle. Disposed within the container are means responsive to the level of the liquid within the container member. A first valve member responsive to the movement of the liquid level is provided for the discharge of gases into a gas exhaust chamber and out of the device through the vacuum pump.
    Type: Grant
    Filed: May 11, 1979
    Date of Patent: February 17, 1981
    Assignee: Griffin International, Inc.
    Inventors: Walter W. Brennan, Charles R. Myers, Paul E. Perry
  • Patent number: 3930538
    Abstract: A wellpoint having an outer screen pipe, and an inner intake pipe connected to a vacuum source. A positionable valve is mounted between the screen pipe and the intake pipe to regulate the amount of screen pipe surface subject to vacuum by the intake pipe.
    Type: Grant
    Filed: November 5, 1974
    Date of Patent: January 6, 1976
    Assignee: Griffin Wellpoint Corporation
    Inventors: Walter W. Brennan, Charles R. Myers, Paul E. Perry