# US 2023/0405231 A1 · Syringe plunger finger ring structures

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- Number: US 2023/0405231 A1
- Document ID: US20230405231A1
- Status: Published application
- Kind: A1
- Application number: 18/241,462
- Filed: 2023-09-01
- Published: 2023-12-21
- Earliest claimed: 2021-04-13
- Assignees: Algen & Klemer, L.L.C.
- Inventors: Gennady I. Kleyman; Alexander Merson
- Web page: https://patentgrep.com/patent/US20230405231A1

## CPC

- A61M 5/3137: {with finger grip means, e.g. for easy manipulation of the syringe rod}
- A61M 5/3148: {Means for causing or aiding aspiration or plunger retraction}
- A61M 2005/3139: {Finger grips not integrally formed with the syringe barrel, e.g. using adapter with finger grips}
- A61M 2205/586: Ergonomic details therefor, e.g. specific ergonomics for left or right-handed users
- A61M 2210/0637: Teeth
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}

## Abstract

A syringe finger ring and finger ring inserts, that in various embodiments, provides or connects to a syringe that comprises a syringe body capable of having a volume of material therein and a plunger disposed to enter the syringe body and dispense material from the syringe body by movement of plunger, and a novel a finger ring related structures having an open area and connected, by various structures, to the plunger adapted to receive a finger within the finger ring open area, including a spacer of various embodiments inserted within the open area to selectively reduce the open area and provide more controllable engagement of the syringe plunger by the operator finger in distal and proximal strokes.

## Claims

### Claim 1

An apparatus attachable to a syringe finger ring having an open area within the finger ring and connected to a syringe plunger having a plunger shaft axis extending radially outward from the finger ring, a radial dimension extending across said finger ring open area, comprising:
a spacing member having surface disposed within said open area to provide reduction in said finger ring radial dimension ;
a retaining member, enabling said spacing member to be retained on said syringe finger ring within said open area.

### Claim 2 (depends on 1)

The apparatus of claim 1, wherein said retaining member comprises
a holding block engaging said syringe finger ring, and
an adjustment member disposed to adjustably connect said spacing member and said holding block and provide adjustable movement of said spacing member along said radial dimension within said finger ring open area.

### Claim 3 (depends on 2)

The syringe of claim 2, wherein said adjustment member comprises a screw and said holding block includes a threaded shoulder to receive said adjustment screw disposed to move said spacing member toward said open area.

### Claim 4 (depends on 1)

The syringe of claim 1, wherein said finger ring comprises a finger ring longitudinal width perpendicular to said radial dimension, and spacing member longitudinally engages said finger ring width and comprises longitudinally opposing members applied to opposing edges of said finger ring width and having a radial thickness selected according to a desired radial dimension reduction of said open area.

### Claim 5 (depends on 4)

The syringe of claim 4, wherein said spacing member includes an external portion to partially surround a radially outer portion of said finger ring.

### Claim 6 (depends on 4)

The syringe of claim 4, wherein said spacing member receives said retaining member therein.

### Claim 7

(canceled)

### Claim 8 (depends on 1)

An apparatus of claim 1, wherein, comprising:
the spacing member comprises a segment member having a curved surface, curved in a first dimension, and having a selected thickness; and
the retaining member comprises an attachment member retained to said curved segment member and disposed to provide compression attachment force perpendicular to said radial first dimension and axial to the plunger axis, to an adjacent structure.