Document Type and Number:
Japanese Patent JPS5192701
Kind Code:
A
Abstract:
An air hammer having a main body including an elongated cavity with a ram slidably mounted therein. The ram is driven by compressed air delivered through inlet means to the cavity in such a way as to drive the ram up and down to impact a tool. Exhaust from the hammer is directed into a plurality of elongated expansion chambers which are positioned within the body of the hammer. The expansion chambers extend to each end of the hammer body and exhaust to the atmosphere through open ports. Inserts are placed within the elongated expansion chambers to divide the chambers into properly sized cavities for greatest sound attenuation. Holes extend through these inserts for the eventual passage of exhausting air therethrough. The inserts are of neoprene having a durometer hardness of from 75 to 90. The size of the expansion chambers and the configuration and positioning of the inserts are intended to provide a muffling of the noise and shock of the exhaust. A shut off system is also provided to stop the hammer when it is unloaded.
Application Number:
JP15385875A
Publication Date:
August 14, 1976
Filing Date:
December 23, 1975
Export Citation:
International Classes:
B25D17/12; E21B1/30; (IPC1-7): B25D17/12