F - Mech Eng,Light,Heat,Weapons – 01 – N
Patent
F - Mech Eng,Light,Heat,Weapons
01
N
F01N 13/08 (2010.01) F01N 13/14 (2010.01) B21C 37/00 (2006.01) B23K 31/02 (2006.01) F16L 9/18 (2006.01)
Patent
CA 2602124
A double-walled exhaust pipe is used with an internal combustion engine and includes a first elongate outer tube (17) and a second elongate inner tube (15) positioned concentrically within the outer tube (17) and affixed at the ends. A chamber (25) is created between the inner and outer tubes which extends substantially their entire length and is sealed against the atmosphere by welding at the ends of the tubes. A one-way valve (20) and (22) is affixed to the outer tube (17) and in fluid communication with the chamber (25) so that a vacuum having a negative pressure at least 20 inches of mercury can be drawn. The outer tube (17) preferably has a greater wall thickness than the inner tube (15).
L'invention porte sur un pot d'échappement à double paroi de moteur à combustion interne comprenant un premier tube extérieur allongé (17) et un deuxième tube intérieur allongé (15) coaxial avec le premier tube (17), fixés par leurs extrémités. L'espace entre les deux tubes qui présente sensiblement la même longueur, constitue une chambre séparée de l'atmosphère par des soudures faite à ses deux extrémités. Le tube extérieur (17) comporte un clapet (20) et (22) communiquant avec la chambre (25) et pouvant y créer une dépression de 20 pouces de mercure. Le tube extérieur (17) présente de préférence des parois plus épaisses que celles du tube intérieur (15) .
Johnson David J.
Moffat & Co.
LandOfFree
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