Patents Examined by G. P. La Point
  • Gradient pump apparatus
    Patent number: 3976400
    Abstract: A high pressure positive displacement gradient pump for two flowable materials utilizing two reciprocating pistons with the pair of pistons pumping in an overlapping reasonably pulse free manner. The gradient of the two flowable materials is created by adjustment of the stroke of each piston. Streams for the pair of pistons are combined and mixed in a mixing chamber. A third pair of pistons may deliver the mixed stream at high pressure to the desired location.
    Type: Grant
    Filed: March 3, 1975
    Date of Patent: August 24, 1976
    Assignee: Altex Scientific, Inc.
    Inventor: Emery Major