| 摘要 |
<p>A double acting trigger pump on a container. The problem with trigger sprayers is that they lack a more forceful spray and a greater output per stroke. The device employs an improved double acting trigger actuated piston pump that permits more leverage per stroke. The pump (10) includes a cylinder (40) and a piston (42) therein. A double piston seal (44) is at the inner end of the piston (42) and includes an outlet valve (60) coaxial with a longitudinal bore (50) in the piston (42). A supplemental pump chamber (74) that also communicates with the bore (50) is defined between outer surfaces of the piston (42) and inner surfaces of the cylinder (40) as well as the double piston seal (44) and a rearward retaining ring (41).</p> |
