Verfahren und Vorrichtung zum Abloesen und Abtragen von Fuellmaterial aus einem Kanal

DE 19824966 A UPAB: 20000215 NOVELTY - An instrument (1) advanced into the opening is connected (2) to a high pressure source of fluid flow, forming a jet in the channel (6) before introduction. The filling (17) of the channel is excavated and carried back (7) with the flow, towards the opening. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the corresponding instrument. Preferred features: A gas is also introduced through the connection (2, 5), into the region (6) ahead of the instrument. The fluid jets rotate about the axis. Suction is applied to the channel opening, to extract the filling excavated, towards the rear (7) of the instrument. Salient features of the equipment include a rearward nozzle (4) (causing suction and fostering extraction). Lines for gas and liquid (2, 5) are separate. The nozzles are aimed to induce swirl. Adapters make pressure-tight connection with the channel opening. A separator divides the filling material for storage, from the fluid. USE - To remove the spinal cord from slaughtered animals (claimed use). To clear out any variably sized channel with longitudinal curvature by gas and liquid-jetting, recovering solids and process fluid. ADVANTAGE - The method provides for clean extraction in a channel which is varied in diameter and non-linear. It is a sealed, non-contacting method, containing and separating the material extracted from the process liquid. The jet both loosens and breaks-up the spinal cord materials, also conveying them out. The rearward nozzles contribute to all these functions. Swirl reinforces removal