inertia block

inertia block

inertia block
pump on an inertia block
A concrete block which serves as a base for mechanical equipment such as fans or pumps; the block is mounted on a resilient support to reduce the transmission of vibration to the building structure.
References in periodicals archive ?
Interceptor sears and independent inertia block round out the action features.
When the minute hand reaches 60 minutes, a device activated by a central spiral causes the end of the rod to arm a small spring with an inertia block that, in turn, drives the rotation of the hour disc.
I tried replacing the inertia blocks and buffer disc in the stock aluminum buffer with a lead weight, but that did not increase weight much.