UN MARTINETE SUBMARINO DEL TIPO DE DESCARGA DE GAS.

摘要

An underwater gas discharge type hammer is provided with a gas reservoir into which expended ram driving gas exhausts to avoid aeration of incoming water which surrounds the gas discharge device of the hammer. The gas resevoir is also arranged as a diving bell to minimize pressure changes under the hammer ram and thereby to maximize ram stroke and improve sharpness of ram impact on the hammer anvil.