Patent ID: 7980240
Filing Date: 2011-07-19
Classification: B25D,E02F

Abstract:
1. A breaking apparatus including: a movable mass for impacting on a striker pin; a housing containing the mass and striker pin, and the striker pin configured to be axially aligned with the mass and partially protrude through the housing to engage a work surface to be impacted, said apparatus characterised in that the striker pin has at least two indents at different longitudinal locations and is configured to be locatable in a plurality of longitudinal retaining locations, each location defining a fixed range of striker pin longitudinal travel allowable during use in impacting operations wherein the striker pin is attached to the breaker housing at a retaining location by a retaining pin coupling with one of the indents configured to allow the striker pin said range of longitudinal travel during impacting operations, and also providing, with respect to said driven end, a distal and proximal travel stop for the striker pin.