HYDROHAMMER Russian patent published in 2008 - IPC E02D7/10 

FIELD: constructional engineering.

SUBSTANCE: invention refers to hydrohammer for driving earth in reinforced concrete piles, steel pipes, tongues and others drive components. The hydrohammer contains impact weight, casing with guide rails, hydrocylinder rigidly fixed on the casing, hydrocylinder rod pivotally connected to impact weight through spherical joint placed between upper and lower sliding thrust bearings movable relative to impact weight in direction perpendicular to impact weight axes. Note that the clearance between thrust bearing generating lines and impact weight is greater than that between impact weight and guide rails.

EFFECT: improved reliability and durability of hammer hydrocylinder.

1 dwg