Patents Assigned to Appro Healthcare, Inc.
  • Patent number: 6413239
    Abstract: The invention is directed to an improved infusion pump (15). In the preferred embodiment, the infusion pump is comprised of an elastomeric hollow balloon (140) and a longitudinal member (110), the balloon having an axial and radial dimension and an open end (22), the longitudinal member (110) having an insertion member (16) extending into the hollow portion (24) of the balloon, the insertion member and the balloon being so configured that the insertion member stretches the elastomeric balloon in the radial direction, but does not stretch the balloon in an axial direction, whereby the infusion pump delivers the quantity of liquid at a substantially constant flow rate. The present invention also discloses an infusion pump comprising a hollow inert membrane (130), an insertion member extending into the hollow portion (23) of the membrane, and the insertion member and the membrane extending into the hollow portion of the balloon, such that the membrane is between the insertion member and the balloon.
    Type: Grant
    Filed: November 17, 1999
    Date of Patent: July 2, 2002
    Assignee: Appro Healthcare, Inc.
    Inventors: William H. Burns, John C. McNeirney, William S. Gibbons, Jr.
  • Patent number: 6213986
    Abstract: A fluid flow rate control device, especially adapted for controlling the flow of IV fluid to a patient, comprises a first vented fluid chamber having an upper fluid inlet end with a hollow spike which enables fluid connection with a conventional fluid container. A free floating float valve in the first chamber blocks the flow of fluid into the first chamber from the fluid container according to whether or not the fluid level in the first chamber is at a preestablished fluid level, thereby providing a constant pressure head regardless of fluid level in the fluid container. A lower end of the first chamber is connected, through a flow regulator, such as a screw-type valve, to an upper inlet end of a second, vented, drip chamber, the lower end of which is adapted for connection to a discharge tube, such as an IV tube.
    Type: Grant
    Filed: November 28, 1997
    Date of Patent: April 10, 2001
    Assignee: Appro Healthcare, Inc.
    Inventor: Phillip H. Darling, Jr.