Patent attributes
A liquid-sealed anti-vibration device comprising: an inner tube (1), an outer tube (2); rubber bodies (3), (4) interconnecting the inner and outer tubes (1), (2) in a liquid-tight manner at two positions spaced in an axial direction; a partition wall disposed between the rubber bodies (3), (4) to divide a space between the inner and outer tubes into two parts in the axial direction, the partition wall having an annular rigid member (5a) and an elastic member (5b); liquid chambers (8), (9) configured in such a way that the spaces partitioned by the partition wall (5) are filled with non-compressible liquid; and a limiting passage (7) provided in the partition wall (5) to allow the liquid chambers (8), (9) to communicate with each other, wherein the annular rigid member (5a), protrudes from the inner tube (1) toward the outer tube, the elastic member (5b) connects the annular rigid member (5a) to the outer tube (2), and the limiting passage (7) is formed by at least one passage groove (5c), the passage groove being formed on the outer circumferential surface of the annular rigid member (5a) and extending at least one time around the annular rigid member, and by a circumscribed rigid tube member (6) fixed to the elastic member (5b) so as to close opening of the passage groove (5c) via a seal member (5d) in a liquid-tight manner.
