|6227307||Sound and dust proof breaker|
A hydraulic breaker for absorbing and reducing vibration and noise generated from the breaker and for reducing debris and dust scattered from the impact tool during using the breaker is provided. Space between main body of the breaker and outer housing is...
|4702325||Apparatus and method for driving casing or conductor pipe|
Apparatus for driving casing, piles, or conductor pipe into the ground comprises in combination; an external reciprocal impact driving means supported atop the conductor pipe, internal rotatable drilling means supported within the conductor pipe, and mean...