# US 11,307,008 B2 · Dart and dart retainer

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,307,008 B2
- Document ID: US11307008B2
- Status: Granted
- Kind: B2
- Application number: 15/775,564
- Filed: 2016-11-11
- Published: 2018-11-15
- Granted: 2022-04-19
- Earliest claimed: 2015-11-11
- Assignees: Byrna Technologies Inc.
- Applicants: Security Devices International (SDI)
- Inventors: André Johann Buys
- Web page: https://patentgrep.com/patent/US11307008B2

## CPC

- F42B 12/54: by implantation, e.g. hypodermic projectiles
- A61D 7/00: Devices or methods for introducing solid, liquid or gaseous remedies or other materials into or onto the bodies of animals (for reproduction or fertilisation A61D19/00)
- A61M 5/3286: {Needle tip design, e.g. for improved penetration}
- A61M 5/329: {characterised by features of the needle shaft}
- A61M 5/2046: {Media being expelled from injector by gas generation, e.g. explosive charge}
- A61M 5/206: {with automatic needle insertion}
- A61M 2005/2013: {triggering of discharging means by contact of injector with patient body}
- A61M 2005/3289: {with rotation of the needle, e.g. to ease penetration}
- A61M 2250/00: Specially adapted for animals
- F16B 15/06: with barbs, e.g. for metal parts; Drive screws
- F42B: EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION (explosive compositions C06B; fuzes F42C; blasting F42D)
- A61D: VETERINARY INSTRUMENTS, IMPLEMENTS, TOOLS, OR METHODS
- 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)}
- F16B: DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING (couplings for transmitting rotation F16D)

## Abstract

The invention relates to a dart (10) comprising a body, the body defining a chamber (24) having a plunger located therein to operatively deliver a substance through a hypodermic needle (32) extending through a front end of the body, and a retainer comprising a barb body locatable on the hypodermic needle (32) characterised in that the barb body is threaded. The invention further relates to a dart retainer, wherein the retainer comprises of a threaded barb body locatable on a hypodermic needle (32) of a dart (10).

## Claims

### Claim 1

A dart comprising
a body, the body defining a chamber having a plunger and a striker pin located therein, the striker pin configured to operatively strike a primer for actuating the plunger when the dart hits an animal to operatively deliver a substance through a hypodermic needle extending through a front end of the body, and
a retainer comprising a barb body locatable on the hypodermic needle characterised in that the barb body is threaded which prevents the dart from being dislodged from the animal until the dart is removed by a user while allowing the user to remove the dart when the animal is inhibited by imparting rotational force resulting in minimal damage to a tissue and skin of the animal.

### Claim 2 (depends on 1)

The dart of claim 1, wherein the body includes a stabilising member connected to a tail of the body for stabilising the dart in flight when the dart is discharged from a weapon, and an annular member connected to the stabilising member at a rear end of the stabilising member.

### Claim 3 (depends on 2)

The dart of claim 2, wherein the striker pin, the primer and the plunger are disposed in an insert.

### Claim 4 (depends on 2)

The dart of claim 2, wherein the annular member is substantially a same circumference as the front end of the body.

### Claim 5 (depends on 4)

The dart of claim 4, wherein a circumference of the body decreases towards the annular member.

### Claim 6 (depends on 2)

The dart of claim 2, wherein the stabilising member is a plurality of fins helically arranged relative to the body to cause the dart to operatively spin along a longitudinal axis of the dart; and wherein an orientation of helices of the fins and the barb body is the same such that a direction of spin of the dart corresponds to a thread orientation of the barb body to facilitate entry of the barb body into the animal.

### Claim 7 (depends on 1)

The dart of claim 1, wherein the front end of the body includes a shock absorber member.