A method of fabricating a composite material part, in particular a sandwich panel, from a plurality of assembled-together preforms
CA 2115473 C · Owner: Societe Europeenne De Propulsion · Inventors: Limousin, Jean-Louis; Castagnos, Stephane
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Distinct preforms are made for different portions of a composite material part that is to be fabricated, and they are assembled together in a nondensified, state or in a state that is not completely densified by bonding respective contacting, surfaces of the preforms (13 15, 36) together by means of fibrils (17 19), projecting perpendicularly from the surface of one of the preforms (13 15) , and in, which the surface of another preform (36) is engaged. The assembled-together preforms are then co-densified. The fibrils are formed on the surface of a fiber, preform by the ends of fibers thereof that have been displaced by the preform being, needled. The method is particularly suitable for …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed February 11, 1994 and granted May 1, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 11, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 11, 2016.
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