Syringe with indicator float

Patent metadata

Field	Value
Publication number	US-10378949-B2
Application number	US-201515317167-A
Country	US
Kind code	B2
Filing date	Jun 9, 2015
Priority date	Jun 10, 2014
Publication date	Aug 13, 2019
Grant date	Aug 13, 2019

Abstract

A syringe assembly may include a syringe having a distal end, a proximal end, and a sidewall extending between the distal end and the proximal end and defining an interior volume; and an indicator float provided in the interior volume of the syringe. The indicator float may be buoyant such that the indicator float is movable between the distal end and the proximal end of the syringe based on a fluid fill level within the interior volume of the syringe.

First claim

The invention claimed is:

1. A syringe assembly, comprising:
a syringe having a distal end, a proximal end, and a sidewall extending between the distal end and the proximal end and defining an interior volume; and
an indicator float provided in the interior volume of the syringe,
wherein the indicator float comprises a cap, a base, and at least two distal arms extending radially inward and longitudinally in a distal direction from the base to the cap and connecting the cap to the base, wherein the indicator float has a frusto-conical shape, and
wherein the indicator float is buoyant such that the indicator float is movable between the distal end and the proximal end of the syringe based on a fill level of a fluid within the interior volume of the syringe.

2. The syringe assembly of claim 1 , further comprising a plunger provided in the interior volume of the syringe,
wherein the plunger is reversibly movable between the distal end and the proximal end of the syringe; and
wherein a distal surface of the plunger has a shape that substantially corresponds to the frusto-conical shape of the indicator float.

3. The syringe assembly of claim 1 , wherein the cap has an annular shape with a central opening.

4. The syringe assembly of claim 1 , wherein the base has an annular shape with a central opening.

5. The syringe assembly of claim 1 , wherein the base defines a plurality of openings, wherein the plurality of openings defined by the base are circumferentially spaced around the base.

6. The syringe assembly of claim 1 , further comprising a movably captured member provided on the indicator float.

7. The syringe assembly of claim 6 , further comprising a captured member enclosure provided on the indicator float, wherein the captured member enclosure is configured to retain the movably captured member such that the movably captured member is movable within the captured member enclosure.

8. The syringe assembly of claim 1 , wherein an outer circumferential surface of the indicator float is sized to be in proximity to the sidewall.

9. The syringe assembly of claim 1 , further comprising:
a lower cap; and
at least two proximal arms extending in a proximal direction from the base to the lower cap.

10. The syringe assembly of claim 1 , wherein the at least two distal arms connecting the base to the cap spiral from the base to the cap.

11. The syringe assembly of claim 1 , wherein the indicator float is positioned in the interior volume of the syringe to prevent pivoting of the indicator float relative to a longitudinal axis of the syringe.

12. The syringe assembly of claim 1 , further comprising a second indicator float positioned in the interior volume of the syringe, wherein the second indicator float has at least one of a different density and a different buoyancy than the indicator float.

Assignees

• Bayer Healthcare Llc

Inventors

• Uber Iii Arthur E
• Cowan Kevin P
• Sams Stephen

Classifications

• A61M5/40

  using low-level float-valve to cut off media flow from reservoir {(position detection of a floating member A61M5/1685)} · CPC title

• G01F11/027

  of the syringe type · CPC title

• A61M2205/583

  by visual feedback · CPC title

• A61M5/31511

  Piston or piston-rod constructions, e.g. connection of piston with piston-rod (A61M5/5066 takes precedence) · CPC title

• A61M5/007

  for contrast media · CPC title