INTRAVENOUS FEEDING APPARATUS

• US 3,670,926 A
• Filed: 09/11/1969
• Issued: 06/20/1972
• Est. Priority Date: 09/11/1969
• Status: Expired due to Term

• Current Assignee: Charles C. Hill
• Original Assignee: Charles C. Hill
• Inventors: Hill, Charles C.
• Primary Examiner(s): Reeves, Robert B.
• Assistant Examiner(s): Slattery, James M.
• Application Number:
  US04/857,151
• Time in Patent Office: 1,013 Days
• Field of Search: 222/47,99,96,100,101,95,23 128/214,214.1 116/129AB
• US Class Current: 222/47
• CPC Class Codes: A61M 5/148 flexible, e.g. independent bagsA61M5/155 takes precedence

Abstract

An intravenous feeding device comprising a base, a drum movable along a track on said base and a constant tension coiled spring having one end thereof fixed to the drum and the other to the base so that when a collapsible container is positioned, the drum acts upon the collapsible container to dispense the contents of the container. A latch is provided for locking the drum with the spring in its extended position and acceleration and position responsive means are provided for locking the drum in the event that the drum is released during loading or in the event that the material is dispensed at excessive speed or in the event that one end of the base is elevated beyond a predetermined angle. Gauge means are provided for indicating the rate at which fluid is dispensed.

Claims

1. In an intravenous feeding apparatus, the combination comprising a base, means on said base defining a track, a drum, said drum having portions thereof engaging said track, a constant tension spring having one end thereof connected to said drum and the other end thereof fixed to said base, means at one end of said base for locking said drum in position with said spring extended, means for releasing said locking means, whereby a collapsible container interposed between said drum and said base is progressively squeezed by the convolutions of said spring to dispense the contents thereof, means responsive to acceleration of said drum beyond a predetermined rate to lock said movement of said drum and thereby prevent further dispensing of the contents of a collapsible container in position.

2. In an intravenous feeding apparatus, the combination comprising a base, means on said base defining a track, a drum, said drum having portions thereof engaging said track, a constant tension spring having one end thereof connected to said drum and the other end thereof fixed to said base, means at one end of said base for locking said drum in position with said spring extended, means for releasing said locking means, whereby a collapsible container interposed between said drum and said base is progressively squeezed by the convolutions of said spring to dispense the contents thereof, means responsive to elevation of said one end of said base beyond the predetermined point to prevent movement of said drum toward said one end of said base.

3. In an intravenous feeding apparatus, the combinatioN comprising a base, means on said base defining a track, a drum, said drum having portions thereof engaging said track, a constant tension spring having one end thereof connected to said drum and the other end thereof fixed to said base, means at one end of said base for locking said drum in position with said spring extended, means for releasing said locking means, whereby a collapsible container interposed between said drum and said base is progressively squeezed by the convolutions of said spring to dispense the contents thereof, means movable with said drum and responsive to the acceleration thereof and operable to engage said track when the acceleration exceeds a predetermined amount to thereby lock said drum to said track.

4. In an intravenous feeding apparatus, the combination comprising a base including a bottom wall and integral side walls, each said side wall having portions defining an inwardly facing track, low friction members slidable in said track, a drum rotatably mounted on said members, a constant tension spring having one end thereof fixed to said base, whereby a collapsible container interposed between said drum and said base is progressively squeezed by the convolutions of said spring to dispense the contents thereof, means responsive to movement of said drum beyond a predetermined rate to lock said movement of said drum and thereby prevent further dispensing of the contents of a flexible container in position or motion of the drum.

5. In an intravenous feeding apparatus, the combination comprising a base including a bottom wall and integral side walls, each said side wall having portions defining an inwardly facing track, low friction members slidable in said track, a drum rotatably mounted on said members, a constant tension spring having one end thereof fixed to said base, whereby a collapsible container interposed between said drum and said base is progressively squeezed by the convolutions of said spring to dispense the contents thereof, means responsive to elevation of said one end of said base beyond the predetermined point to prevent movement of said drum toward said one end of said base.

6. In an intravenous feeding apparatus, the combination comprising a base including a bottom wall and integral side walls, each said side wall having portions defining an inwardly facing track, low friction members slidable in said track, a drum rotatably mounted on said members, a constant tension spring having one end thereof fixed to said base, whereby a collapsible container interposed between said drum and said base is progressively squeezed by the convolutions of said spring to dispense the contents thereof, means movable with said drum and responsive to the acceleration thereof and operable to engage said track when the acceleration exceeds a predetermined amount to thereby lock said drum to said track.

7. The combination set forth in claim 3 wherein said last-mentioned means comprises a member slidable in said track and having an upwardly and rearwardly inclined slot, a roller in said slot, said roller being operable to move up said inclined surface upon acceleration of said drum beyond a certain rate to engage said track.

8. The combination set forth in claim 7 wherein said member comprises a block of low friction material.

9. The combination set forth in claim 1 including a scale extending longitudinally along said base, said scale including a plurality of markings thereon, said markings extending at an angle to a perpendicular to the longitudinal axis of said scale and comprising equally spaced major increments, and an indicator movable with said drum extending transversely of said scale and comprising a plurality of markings spaced at minor increments thereon.

10. The combination set forth in claim 9 wherein the width of said major incremEnts is a multiple of said minor increments.

11. The combination set forth in claim 9 wherein said indicator is perpendicular to the longitudinal axis of said scale.

12. The combination set forth in claim 9 wherein said markings on said scale comprise contrasting stripes having a width equal to one said major increment.

13. The combination set forth in claim 9 wherein the angle which said markings of said scale make with a perpendicular to the longitudinal axis of said scale has the relationship of where a Major increment Delta a Least indicated increment n The number of least indicated increments in a major increment a n Delta a Delta b Observed '"'"''"'"''"'"''"'"'intersection'"'"''"'"''"'"''"'"' movement for least indicated increment b n Delta b Alpha Slope of major increment lines.

14. The combination set forth in claim 9 wherein said indicator overlies said scale.

15. The combination set forth in claim 9 wherein said indicator is mounted on a member slidable in the track with the drum.

16. The combination set forth in claim 6 wherein said last-mentioned means comprises an upwardly and forwardly inclined slot in said member slidable in said track, a roller in said slot, said roller being operable to move up said inclined surface upon acceleration of said drum beyond a certain rate to engage said track.

17. In an intravenous feeding apparatus, the combination comprising a base, means on said base defining a track, a drum, said drum having portions thereof engaging said track, a constant tension spring having one end thereof connected to said drum and the other end thereof fixed to said base, whereby a collapsible container interposed between said drum and said base is progressively squeezed by the convolutions of said spring to dispense the contents thereof, means responsive to movement of said drum beyond a predetermined rate to lock said movement of said drum and thereby prevent further movement or dispensing of the contents of a flexible container in position.

18. In an intravenous feeding apparatus, the combination comprising a base, means on said base defining a track, a drum, said drum having portions thereof engaging said track, a constant tension spring having one end thereof connected to said drum and the other end thereof fixed to said base, whereby a collapsible container interposed between said drum and said base is progressively squeezed by the convolutions of said spring to dispense the contents thereof, means responsive to the position of said base operable to lock movement of the drum when the forward end of the base is elevated.