Systems, components, and combinations thereof for pen-type injection devices

Patent metadata

Field	Value
Publication number	US-12350476-B2
Application number	US-202117213777-A
Country	US
Kind code	B2
Filing date	Mar 26, 2021
Priority date	Mar 27, 2020
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

The disclosure provides driver components, systems and drive methods that facilitate improved dose setting, correcting, and/or dispensing in a multiple use pen-type injection device. In particular, various novel braking systems are disclosed that can be implemented within the pen-type injection devices to help achieve the improved dose setting, correcting, and/or dispensing.

First claim

We claim:

1. A medication injection pen, comprising:
a cartridge housing which houses a medication cartridge;
a housing connected to said cartridge housing;
a dose set knob rotatable with respect to said housing;
a dose stop member to prevent setting of a dose that is larger than a remaining amount of medication in the cartridge;
a driver;
a ratchet disk rotatably locked to said driver; and
a brake member rotatably locked to said housing,
wherein
during the setting of the dose and dose correcting,
said ratchet disk is rotatably locked to said driver,
said ratchet disk and said brake member are rotationally fixed with respect to each other, to prevent said driver from rotating with said dose set knob, and
said dose stop member rotates relative to said dose set knob, and

during an injection,
said ratchet disk is rotatably locked to said driver,
said driver moves into locking engagement with said dose set knob and said ratchet disk can move axially with respect to said driver and away from said brake member to allow said driver to rotate with said dose set knob, and
said dose stop member does not rotate relative to said dose set knob.

2. The medication injection pen according to claim 1
wherein
said ratchet disk comprises first teeth including first sloped surfaces and first non-sloped surfaces, and said brake member comprises second teeth includes second sloped surfaces and second non-sloped surfaces,
during the setting of the dose and the dose correcting, said first teeth engage said second teeth to substantially prevent said driver from rotating with said dose set knob, and
during the injection, said driver moves into locking engagement with said dose set knob thereby overcoming friction between said first sloped surfaces and said second sloped surfaces to allow said driver to rotate with said dose set knob.

3. The medication injection pen according to claim 2 , wherein
during said injection, after rotating to a dose increment, said ratchet disk moves into a position with respect to said brake member where at least one of said first teeth move into a base of a next of said second teeth.

4. The medication injection pen according to claim 2 , wherein
said second teeth are spaced to correspond with the rotation of one dose of the medication.

5. The medication injection pen according to claim 1 , wherein
a spring member biases said ratchet disk toward said brake member.

6. The medication injection pen according to claim 5 , wherein
during said injection, said ratchet disk rotates with said driver and moves against said spring member as first sloped surfaces ride over second slope surfaces of said brake member.

Assignees

• Becton Dickinson Co

Inventors

• Quinn Michael
• Cronenberg Richard
• Boyer Robert
• Gorshkov Alexander

Classifications

• A61M5/31563

  interacting with a displaceable stop member · CPC title

• A61M5/2033

  Spring-loaded one-shot injectors with or without automatic needle insertion (multishot dosing syringes A61M5/31525, needle insertion only A61M5/3287) · CPC title

• A61M5/31551 Primary

  including axial movement of dose setting member · CPC title

• A61M5/31585

  performed by axially moving actuator, e.g. an injection button · CPC title

• A61M5/2422

  using emptying means to expel or eject media, e.g. pistons, deformation of the ampoule, or telescoping of the ampoule · CPC title