Pen injection device and method of using same

US8636689B2 · kind B2 · utility

Assignees

• Amylin Pharmaceuticals, LLC · US
• AstraZeneca Pharmaceuticals LP · US

Inventors

• Reynaldo Halili · San Diego, US
• Victor Wei-Chung Chang · San Diego, US
• Phillip A. Estepa · San Diego, US
• Tyler John Holschlag · Vista, US
• Philip J. Simpson · Encinitas, US
• David G. Matsuura · Encinitas, US

Key dates

• Filing date: Jul 16, 2008
• Grant date: Jan 28, 2014
• Expiry date: Jan 3, 2030

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M2206/16
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Pen injection devices (10) and methods of using a pen injection device are disclosed. Pen injection devices include a sterile dual transfer spike assembly (150) including a dual transfer spike defining a fluidic pathway; a first cartridge assembly (12) including a first cartridge (20) containing a first substance; a second cartridge assembly (14) including a second cartridge (30) containing a second substance; a plunger rod (50) translatable in a first direction; and a biasing mechanism (60) configured to bias the plunger rod in a second direction opposite the first direction. Methods of using a pen injection device having a first container, a second container, a plunger rod, and a biasing mechanism include activating the pen injection device, thereby creating a fluidic pathway between the first container and the second container; and translating the plunger rod at least once, thereby transferring a first substance from one container to the other container to mix with a second substance.