Patents Examined by Linda C. M. Dorak
  • Self-driven pump device
    Patent number: 5135500
    Abstract: An apparatus for delivering fluid with a relatively constant, controlled rate of flow comprises a vacuum power means, a fluid storage means in axial alignment with the vacuum power means and a plunger means carried by the vacuum power means and in axial communication with the fluid storage means. The plunger means is driven by a vacuum which collapses under atmospheric pressure, and as it is driven it effects delivery of the fluid from the fluid storage means.
    Type: Grant
    Filed: October 31, 1989
    Date of Patent: August 4, 1992
    Assignee: Prime Medical Products, Inc.
    Inventor: Brian D. Zdeb