| 摘要 |
A pneumatic fastener driving tool comprising, a trigger assembly (20) having an actuatable trigger (21) which is operatively connected with a trigger valve (22) for opening and sealing a pressure reservoir (25), a main valve (26) for closing and opening a passageway between said trigger assembly (20) and said piston (63), whereas said main valve (26) is arranged in the passageway for compressed air between the trigger assembly (20) and the piston (63), a muffler means (90) for guiding the fluid which has left the piston chamber out of the fastener driving tool. In order to improve the noise absorption of such a fastener driving tool said muffler means (90) is provided in a tubular wall (91,92) of the muffler means with vent openings (94) for the fluid, through which the fluid can flow out of the muffler by turning its flow direction. This turn reduces the energy contained in the fluid, which leads to reduced noise levels when the fluid flows out of the muffler and of the fastener driving tool.
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