IPC Definitions - January 01, 2012
F41H 11/18 - Definition
This group covers:
Systems or methods attached to or intrinsic part of self-propelled vehicles using elements which linearly, nearly vertically impact a localized/limited ground area with a stamping element like a foot or hammer.
Systems or methods attached to or intrinsic part of self-propelled vehicles using a rotary flail system with chain mounted ground pounding/impacting means attached to a motor-driven rotating drum located on the front of the vehicle.