Injection device with cammed ram assembly

US9364610B2 · kind B2 · utility

Assignee

• Antares Pharma, Inc. · US

Inventors

• Thomas E. Kramer · Coon Rapids, US
• Matthew H. Rust · River Falls, US
• Paul M. Goudreau · Edina, US
• Peter A. Hoeft · Seattle, US
• Julius C. Sund · Plymouth, US
• Peter L. Sadowski · Woodbury, US

Key dates

• Filing date: May 7, 2013
• Grant date: Jun 14, 2016
• Expiry date: Feb 14, 2034

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M2202/048
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An exemplary embodiment of injector includes a trigger mechanism, an energy source, and a user-operable firing-initiation member. The trigger member can include a trigger member having a retainer portion, and a ram assembly having a ram configured to pressurize a medicament container for expelling a medicament therefrom and a trigger engagement member configured to engage the retainer portion of the trigger member in a pre-firing condition. The energy source can be associated with the ram for powering the ram to expel the medicament, and the user-operable firing-initiation member can be operable for causing an axial rotation between the trigger engagement member and the retainer portion from the pre-firing condition to a firing condition in which the trigger engagement member is released from the retainer portion to allow the energy source to fire the ram.