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MEDICAL LIQUID ADMINISTRATION DEVICE

  • US 3,640,277 A
  • Filed: 12/09/1968
  • Issued: 02/08/1972
  • Est. Priority Date: 12/09/1968
  • Status: Expired due to Term
First Claim
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1. In parenteral liquid administration apparatus, the combination comprising:

  • a. container means having a first zone to receive a pressurized first fluid and a second zone for a supply of a deliverable second fluid, said zones extending in such confined and pressure-transmitting relation that the second fluid remains pressurized by the first fluid as the second fluid zone diminishes and the first fluid zone expands;

    b. means to deliver said first fluid to said first zone and including a fluid pressure regulator and variable flow restrictor means connected in fluid-flow-transmitting relation between said regulator and said first zone;

    said flow restrictor means having selector means for providing a predetermined but variable pressure drop/flow rate characteristic; and

    c. a conduit for delivering said second fluid for administration to a patient from said second zone.

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