MUMBAI, India, July 5 -- Intellectual Property India has published a patent application (202517055416 A) filed by Compagnie Generale Des Etablissements Michelin, Clermont-Ferrand, France, on June 9, for 'miniaturized volumetric extruder using twin conical screws, each provided with a thread, the pitch of which increases to maintain a constant displacement.'
Inventor(s) include Hombert, Christophe.
The application for the patent was published on July 4, under issue no. 27/2025.
According to the abstract released by the Intellectual Property India: "The invention relates to an extruder (1) comprising a first conical screw (2) and a second conical screw (3) which are mounted so as to be counter-rotating in a barrel (4) and which define a volumetric stage (11) within which the threads (5, 6) are interpenetrated and conjugated with respect to each other so as to form, between the barrel (4) and the screws (2, 3), a succession of closed C-shaped chambers (7, 8) in order for the extruder (1) to operate volumetrically. According to the invention, in at least part of the volumetric stage, the pitch (P5, P6) of the thread of said screws (2, 3) increases according to a, preferably quadratic, predefined law of compensation (LP5_11, LP6_11), so that the successive closed chambers (7, 8) each have an individual volume that remains equal to a predetermined constant volume (V2, V3) that forms the displacement of the screw (2, 3) under consideration."
The patent application was internationally filed on Dec. 13, 2023, under International application No.PCT/EP2023/085560.
Disclaimer: Curated by HT Syndication.
