Tool driving or impacting – Impacting devices – With impact cushioning means
Reexamination Certificate
2007-10-16
2011-11-22
Rada, Rinaldi (Department: 3721)
Tool driving or impacting
Impacting devices
With impact cushioning means
C173S162100, C173S128000
Reexamination Certificate
active
08061439
ABSTRACT:
A rock breaking device employs a falling weight and a striker pin or other tool held within a tool holding structure supported by a recoil assembly includes a number of isolator structures that protect the rock breaking device by absorbing excess forces that may be applied to the recoil assembly. Each isolator structure includes a front plate that extends below a lower side of a recoil tube flange. In new rock breaking devices, the front plates may be incorporated as part of the isolator structures. Alternatively, an existing rock breaking device can be retrofitted by welding a heavy plate onto the front of an existing front plate of the isolator structures. The heavy plate extends beyond the lower side of the recoil tube flange to provide greater strength.
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Moore & Hansen PLLP
Rada Rinaldi
Weeks Gloria R
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