Abstract: An impact hammer for breaking a working surface, the hammer including a drive mechanism and a housing with an inner containment surface and a reciprocating hammer weight. A reciprocation cycle of the hammer weight includes an upstroke and a down-stroke, the hammer weight respectively moving upwards and downwards. On the down-stroke the hammer weight impacts a striker pin with a driven end and a working surface impact end. A vacuum chamber in the housing is formed by the containment surface, upper vacuum sealing coupled to the hammer weight and lower vacuum sealing. The hammer weight is driven toward the striker pin by the pressure differential between atmosphere and the vacuum chamber formed on the upstroke. A down-stroke vent permits fluid egress from the vacuum chamber on the down-stroke.

Abstract: An impact hammer (1) for breaking a working surface (5), the hammer including a drive mechanism (11, 12, 14) and a housing (6) with an inner containment surface (8) and a reciprocating hammer weight (9). A reciprocation cycle of the hammer weight (9) includes an upstroke and a down-stroke, the hammer weight (9) respectively moving upwards and downwards. On the down-stroke the hammer weight (9) impacts a striker pin (4) with a driven end (17) and a working surface impact end (18). A vacuum chamber (22) in the housing is formed by the containment surface (8), upper vacuum sealing (24) coupled to the hammer weight (9) and lower vacuum sealing (25). The hammer weight (9) is driven toward the striker pin (4) by the pressure differential between atmosphere and the vacuum chamber (22) formed on the upstroke. A down-stroke vent (43) permits fluid egress from the vacuum chamber (22) on the down-stroke.

Abstract: A tool connection (9, 47) for connecting a tool (1) to a tool support (16), the tool connection (9, 47) including at least one radial shock absorber (19, 20) for at least partially absorbing shock imparted by the tool (1) via the tool connection (9, 47). The radial shock absorber (19, 20) has shock absorbing assemblies (22, 23), each including at least two elastic layers (24) and at least one inelastic layer (25) interleaved between the elastic layers (24). The layers (24, 25) of the shock absorbing assemblies (22, 23) are radially distributed with respect to a connection axis (10, 11) passing through the tool connection (9, 47), the shock absorbing elastic layers (24) including an inner elastic layer (24) and an outer elastic layer (24) radially proximal and distal respectively to the connection axis (10, 11).

Abstract: An apparatus (1) with a reciprocating component (3) fitted with composite cushioning slides (13) on an exterior surface (8, 9). The reciprocating component (3) is movable along a reciprocation path and the composite cushioning slide (13) includes an exterior first layer (14) and an interior second layer (15). The first layer (14) is formed with an exterior surface (16) configured and orientated to come into sliding contact with a containment surface (7) of the apparatus (1) during the reciprocating movement of the reciprocating component (3), the first layer (14) is formed from a material of predetermined friction and/or abrasion resistance properties. The interior second layer (15) is located between the first layer (14) and reciprocating component (3) and is formed from a shock-absorbing material having predetermined shock absorbing properties.

Abstract: A breaking apparatus (1) with a housing (3), striker pin (4), moveable mass (2) and shock absorber. The striker pin (4) has a driven end and an impact end and a longitudinal axis extending between the two ends. The striker pin (4) is locatable in the housing (3) such that the impact end protrudes from the housing (3). The moveable mass (2) impacts on the driven end of the striker pin (4) and the shock-absorber is coupled to the striker pin (4) by a retainer (8) interposed between a first (7b) and second (7a) shock-absorbing assemblies located internally within the housing (3) along, or parallel to, the striker pin longitudinal axis. The first shock-absorbing assembly (7b) is positioned between the retainer (4) and movable mass (2) and is formed from a plurality of un-bonded layers including at least two elastic layers (12) interleaved by an inelastic layer (13).

Abstract: A breaking apparatus (1) with a housing (3), striker pin (4), moveable mass (2) and shock absorber. The striker pin (4) has a driven end and an impact end and a longitudinal axis extending between the two ends. The striker pin (4) is locatable in the housing (3) such that the impact end protrudes from the housing (3). The moveable mass (2) impacts on the driven end of the striker pin (4) and the shock-absorber is coupled to the striker pin (4) by a retainer (8) interposed between a first (7b) and second (7a) shock-absorbing assemblies located internally within the housing (3) along, or parallel to, the striker pin longitudinal axis. The first shock-absorbing assembly (7b) is positioned between the retainer (4) and movable mass (2) and is formed from a plurality of un-bonded layers including at least two elastic layers (12) interleaved by an inelastic layer (13).