Infusion apparatus

  • US 5,105,983 A
  • Filed: 10/31/1989
  • Issued: 04/21/1992
  • Est. Priority Date: 10/31/1989
  • Status: Expired due to Term
First Claim
Patent Images

1. An apparatus for dispensing a liquid under pressure at a substantially constant flow rate over a period of time comprising:

  • a housing having a first chamber for containing a holding reservoir and a second chamber for containing a pressure reservoir;

    said second chamber being a substantially spherical chamber and an opening into said spherical chamber;

    an elongated support member disposed in said spherical chamber and having an end disposed at said opening;

    elastic means mounted on said support member in said spherical chamber for defining a pressure reservoir for holding a liquid in a pressurized state for dispensing therefrom;

    inlet means for introducing a liquid into said pressure reservoir;

    outlet means for dispensing liquid from said pressure reservoir to a selected site;

    a holding reservoir in said first chamber for containing a predetermined quantity of a liquid in a non-pressurized state to be dispensed;

    means for connecting said holding reservoir to said pressure reservoir for enabling the transfer of said liquid thereto;

    said holding reservoir is formed of a pliable plastic material having a neck and an opening in said neck for transferring said liquid to said pressure reservoir; and

    means in said first chamber for collapsing said holding reservoir comprising opposed moveable walls moveable toward one another for forcing liquid from said holding reservoir to said pressure reservoir.

View all claims

    Thank you for your feedback