Abstract: 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 filled with fluid supplied from outside of the outer housing. Fluid hose is connected to a fluid hole formed on the outer housing to supply fluid into the space. Upper absorber is disposed between a bracket and upper portion of the main body, lower absorber is disposed between front cover of the outer housing and front head portion of the main body. Side absorbers are disposed between sidewall of the outer housing and outer cylindrical sidewall of the main body to keep a distance between outer housing and main body and to provide the space filled with fluid. Fluid, such as water, filled in the space is ejected through holes formed on the front cover of the outer housing.

Abstract: 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 means associated therewith for introducing air and water under pressure for creating a pressure differential to evacuate the drilling debris and cuttings to the surface. The drilling means is supported within said conductor pipe at the bottom portion thereof near the point of least energy absorption and rebound. The driving and drilling operations may be performed simultaneously or sequentially.