Bioject Inc.

John Lawrence Staylor

Sergio Landau

James Michael Bonicatto

Daniel E Williamson

Ryan R Beylund

Robert A Miller

Keith K Daellenbach

Theodore Walaka Sedler

A needle-free injection device in which a gas cartridge or other source of pressurized gas is used to advance a piston and forcibly expel injectable fluid out through an injection orifice. When a gas cartridge is used, the gas cartridge may be moveable from an initial position to an actuating position in which gas is released to drive the injection, and a recoil inhibiter may be employed to prevent the gas cartridge from moving back to the initial position. A gas cartridge seal may be disposed on the gas cartridge and moveable with the gas cartridge to seal the gas cartridge against an interior wall of a gas cartridge housing. The needle-free injection device may also be configured so that sealing is compromised upon full advancement of the piston, so as to de-pressurize the device after delivery of an injection.

Needle-free injection system

A gas-powered, durable, needle-free hypodermic jet injection device includes a hand-held injector which carries a disposable injection cartridge with a volume of liquid medication to be injected in the form of a high velocity jet capable of penetrating the skin without the use of a hypodermic needle. The injection device provides an injection orifice, and an injection piston. Forceful movement of the injection piston caused by high pressure gas causes a high velocity injection jet of liquid medication to be expelled from the injection cylinder via the injection orifice. The injection device includes features which improve its safety, and also which improve its ease of manufacture, its durability, and its cost effectiveness.

Jet injector apparatus and method

Growing community of inventors

Wilsonville, OR, United States of America

John Lawrence Staylor