| 摘要 |
The pumping mechanism is used in a trigger operated fluid dispensing device, e.g. a trigger sprayer, for pumping fluid from a storage container into a discharge end of a body of the dispensing device. The pumping mechanism includes a chamber within the body of the trigger sprayer, a piston received in the cylinder, two flap valves associated with an internal back wall of the chamber, and a manually operated trigger movably connected to the body of the dispensing device and coupled to an outer end of the piston. The flap valves are normally closed and pressure controlled to ensure a quick filling and emptying of the collection chamber. |
