Fluid-filled cylindrical vibration damping device
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United States of America Patent
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Jan 3, 2006
Grant Date -
Jan 8, 2004
app pub date -
Jul 2, 2003
filing date -
Jul 4, 2002
priority date (Note) -
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Abstract
A fluid-filled cylindrical vibration-damping device wherein an inner and an outer sleeve are elastically connected together at their axially upper ends by an elastic body, at their axially lower ends by a flexible layer, and at their axially intermediate portions by a flexible partition. A pressure-receiving chamber partially defined by the elastic body and an equilibrium chamber partially defined by the flexible layer are disposed on opposite sides of the flexible partition, and are held in fluid communication through an orifice passage defined by an orifice defining member attached to an axially intermediate portion of an inner circumferential surface of the outer sleeve. The flexible partition includes a cylindrical portion extending axially upwardly from an inner peripheral portion of the orifice defining member and an annular curved portion extending radially inwardly from the upper end of the cylindrical portion to be fixed to the inner sleeve.
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