A cushion is a mechanical seal that fills the space between two or more mating surfaces, generally to prevent leakage from or into the joined objects while under compression. ... Caskets for specific applications, such as high-pressure steam systems, may contain asbestos.
One of the most common industrial uses of a cushion is acting as a seal for joining two water pipes. You can also find cushion used to seal boilers and fuel tanks. In all cases, the cushion prevents shock absorption between the component parts.
Vibration isolation and noise control for high-frequency rotary mechanical equipment. For example draught fan, water pump, generator set, air-condition main engine, etc.. When rotational frequency larger than 1000rpm, it’s better to use rubber cushion.
Stamping equipment, the impacting frequency had better avoid the inherent frequency of rubber cushion. For example punching machine, die-cutting machine, press machine, etc..
Since rubber cushion has vibration reduction function at any direction, so it has been widely used in automobile, aerospace, and navigation.