VIBRATION ISOLATOR

摘要

A vibration isolator comprises a helical spring support between a base (3) and a cap (8) from which depends a pendulum rod (14) carrying at its lower end a ball joint (16). A pneumatic damper in the form of a piston (24) forms a gas compression chamber with the cap (8). A friction disc (22) encircles the pendulum rod (14). The natural resonant frequencies of the spring (11) and the pendulum may be selected to be very low, such as 4 to 5 Hertz.