Pneumatic hammer

An air hammer comprising:

• a body, said body including an elongated cavity;
• a ram slidably positioned within said elongated cavity;
• inlet means for directing air to said elongated cavity for controlling the position and motion of said ram;
• outlet means for releasing air from said elongated cavity;
• an anvil slidably positioned in said body below said ram;
• a tool slidably positioned in said body below said anvil;
• and
• shut off means for turning off said ram when said tool is not engaging work, said shut off means including first passageway means to direct air from said inlet means to hold said anvil away from said ram, second passageway means extending through said anvil in communication with said elongated cavity beneath said ram at a first end and with said tool at another end, an exhaust passageway means allowing air to escape from between said anvil and said tool when said tool is not engaging work.

An air hammer comprising

• a body, said body including a primary elongated cavity and at least one secondary cavity;
• a ram slidably positioned within said primary elongated cavity;
• inlet means for directing air to said primary elongated cavity for controlling the position and motion of said ram;
• and
• outlet means for releasing air from said primary elongated cavity, said outlet means including at least one expansion chamber located in at least said secondary cavity in said body adjacent said primary elongated cavity, said expansion chamber being in communication with said primary elongated cavity and extending to exhaust from said body into the atmosphere, said expansion chamber including means for dividing said expansion chamber, said dividing means including holes therethrough for the passage of exhausted air from said divided expansion chamber, said dividing means including inserts sized to be press fit into said expansion chamber, said inserts being of neoprene.