VIBRATION ISOLATOR

The invention provides a vibration isolator (10) for minimising the transfer of vibration forces from a vibrating body to an isolated body (14). The vibration isolator (10) includes a housing (16) which comprises housing components (18, 20 and 22) resiliently connected to one another to define a first reservoir (30), a second reservoir (32) and a port (34). The port (34) connects the first reservoir (30) to the second reservoir (32) and is displaceable relative to the first and second reservoirs so as to vary the volume of the reservoirs in response to relative motion between the vibratin g body and the isolated body (14) along an axis of the housing. A fluid mass i s contained within the first reservoir (30), the second reservoir (32) and the port (34), and the vibration isolator (10) includes two tuning diaphragms (3 6 and 40) operable on the fluid mass. The stiffness of the tuning diaphragms ( 36 and 40) is adjustable by varying the pressure within chambers (38 and 40) adjacent these diaphragms.