Patent ID: 7407017
Filing Date: 2008-08-05
Classification: B28D,E01C,E02D

Abstract:
1. An apparatus for connection to an excavator or other machine, the apparatus including: a hammer having an impacting end for impacting a working surface; a drive mechanism for lifting the hammer; a housing in which the hammer is received, the housing being configured for attachment to said machine, the impacting end of the hammer extending in use from an open end of the housing; and a locking mechanism including a locking member and an actuator, characterised in that the actuator is capable of forcing a hammer-engaging face of the locking member to engage at one or more points along a face of the hammer to lock the hammer within the housing such that the impacting end protrudes from the open end of the housing, thereby allowing the protruding end of the hammer to also be used for pushing or raking material, wherein the locking member engages with said face of the hammer by rotation about a first axis of rotation, the locking member having an eccentric rotational peripheral profile about said first axis of rotation via at least one intermediate linkage, pivotally attached about a second and third axis of rotation to the locking member and actuator respectively.