Power steering attenuation hose construction and method of...

F - Mech Eng,Light,Heat,Weapons – 16 – K

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F16K 47/02 (2006.01) B62D 5/06 (2006.01) F16L 55/045 (2006.01)

Patent

CA 2207401

A power steering attenuation hose construction and method of making the same are provided, the hose construction (20, 20') comprising an outer flexible hose unit (21, 21') having an inlet end (22, 56) and an outlet end (23, 59), a restrictor unit (24, 24') disposed in the outer hose unit (21, 21') and dividing the interior (25) of the outer hose unit into an inlet chamber (26, 26') and an outlet chamber (27, 27') interconnected by the restrictor unit (24, 24'), a first flexible tuning cable unit (36, 36') being interconnected to the inlet end (22, 56) and being disposed in the inlet chamber (26, 26'), and a second flexible tuning cable unit (45, 45') being interconnected to the restrictor unit (24, 24') and being disposed in the outlet chamber (27, 27'), each of the tuning cable units (36, 45; 36', 45') having an open outlet end (41, 49'; 41', 49') spaced from the outlet end (42, 50; 65, 50') of its respective chamber (26, 27; 26', 27'), the ratio of the effective length (L1, L1') of the first tuning cable unit (36, 36') to the effective length (L2, L2') of the second tuning cable (45, 45') being approximately 3 to 2 or higher.

On décrit une structure de durite d'atténuation pour direction assistée et son procédé de fabrication, la structure de la durite (20, 20') comprenant une enveloppe extérieure souple (21, 21') pourvue d'une entrée (22, 56) et d'une sortie (23, 59); une unité de réduction (24, 24') disposée dans l'enveloppe extérieure (21, 21') et divisant l'intérieur (25) de cette enveloppe en un compartiment d'entrée (26, 26') et un compartiment de sortie (27, 27') reliés entre eux par l'unité de réduction (24, 24'); un premier système de câble de réglage flexible (36, 36') relié à l'entrée, (22, 56) et disposé dans le compartiment d'entrée (26, 26'); et un second système de câble de réglage flexible (45, 45') relié à l'unité de réduction (24, 24') et disposé dans le compartiment de sortie (27, 27'), chacun des deux systèmes de réglage (36, 45; 36', 45') étant pourvu d'une extrémité de sortie ouverte (41, 49; 41', 49') espacée par rapport à la sortie (42, 50; 65, 50') de son compartiment respectif (26, 27; 26' 27'), et le rapport entre la longueur efficace (L1, L1') du premier système de câble de réglage (36, 36') et la longueur efficace (L2, L2') du second câble de réglage (45, 45') ayant une valeur environ égale à 3/2 ou plus.

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