spring hammer

spring hammer

[′spriŋ ¦ham·ər]
(mechanical engineering)
A machine-driven hammer actuated by a compressed spring or by compressed air.
References in periodicals archive ?
If you want, we can even remove the main spring hammer strut, remove the spring and polish it up a bit, to smooth-up the cocking of the hammer.
* Spring hammer rappers and sonic sootblowers are selected for backpass cleaning.