| 摘要 |
PURPOSE: To considerably lower the noise level generated from the discharge of air by including a valve means for interconnecting suction and discharge conduit means when a trigger is released. CONSTITUTION: When a rivet is fixed and a tool is reset by releasing the trigger 12, a piston 27 returns to its initial position. The air filling a booster sleeve 26 thus far returns through the suction conduit 24 and flows through a currently opened upper seal 22 (a lower seal 18 is held closed) of a poppet valve 20 to a chamber 30. This chamber exists around a ram sleeve 32 and communicates with the inside of the booster sleeve 26 through a slot. This chamber, therefore, acts as an expansion chamber. The expanded air is discharged from the tool through an outlet conduit 40 by passing between the booster sleeve and the chamber (this annular chamber acts as a ring plenum). As a result, the noise level generated from the discharge of the air is considerably lowered and the desired cooling of the ram sleeve may be attained. |
