US Patent 7555864 Japanese knotweed injector system

A Japanese knotweed injector system for injecting a dose of weed-killing fluid into the stem of a Japanese knotweed, including a fluid dispenser system with a fluid passage, a collared needle with a fluid delivery aperture in communication with the fluid dispenser system, and an actuator connected to the fluid dispenser system for actuating the transmission of fluid from the fluid dispenser system to the fluid delivery aperture. A Japanese knotweed injector system for use with several different needle profiles using interchangeable connectors.