Tool driving or impacting – Impacting devices – With impact cushioning means
Patent
1991-01-15
1992-06-02
Yost, Frank T.
Tool driving or impacting
Impacting devices
With impact cushioning means
173131, B25D 906
Patent
active
051179245
ABSTRACT:
An energy transfer unit is designed for use in conjunction with a pile driving that has an impact block projecting from the lower end of the hammer casing and axially movable therein for transmitting energy from the hammer to a pile to drive the pile. The unit comprises a housing for rigid attachment in axial alignment with the casing of the hammer, the housing receiving and guiding the projecting portion of the pile driver impact block for axial movement therein. A striker plate is guided for axial movement in the housing and is adapted to be impacted by the impact block and to transfer and distribute the impact force from the pile driver evenly and directly to the head of the pile. Cushioning rings within the housing prevent impact between said striker plate and the pile driving hammer housing upon rebound of the pile, and thus prevent damage to the pile driver. The cushioning rings are formed of rubber and are carried at the upper end of the housing by a retainer ring which is engaged by the striker plate when it rebounds. Thus the rebound energy is absorbed by the rubber rings.
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Berminghammer Corporation Limited
Smith Scott A.
Yost Frank T.
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