| 摘要 |
Pneumatic impact hammer for driving a frost plug into an engine block. The hammer includes a port for interconnection to a supply of compressed air, a chamber, a trigger, an elongate tube, a mallet slidably mounted within the tube, and a driver extending from one end of the tube. Compressed air is received by the chamber. Upon depressing the trigger, the compressed air within the chamber is substantially instantaneously applied to the back of the mallet. Consequently, the mallet is driven down the length of the tube toward the driver. The mallet impacts against the driver which, in turn, drives the frost plug into the engine.
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