EP0086240A1 - Resonantly driven pavement crusher - Google …
A pavement breaker including a mobile carrier vehicle is disclosed. A beam (38) is provided having a resonant frequency with a pair of nodes spaced from the input and output ends of the beam and anti-nodes at each end and at the center. An oscillator (46) is fixed to the input end of the beam to vibrate the beam at at least near its resonant frequency.