| 摘要 |
The trigger sprayer comprises a trigger sprayer body having a cylinder therein, a trigger movably mounted to the trigger sprayer body, and the improvement of a piston assembly including a piston body having an unobstructed annular space for receiving an O-ring and an O-ring mounted in the unobstructed annular space for sealing between the piston body and an inner wall in the cylinder in the trigger sprayer body. Preferably, the piston body is formed from two parts which are pressed together to form the unobstructed annular space between the parts for receiving the O-ring.
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