Dispensers, refill units and pumps having suck-back features

A refill unit comprising:

• a container;
• a pump connected to the container;
• an outlet passage having a first cylindrical portion and a second portion;
• an inline suck-back valve located in the in the outlet passage;
• wherein fluid flowing from the pump causes the inline suck-back valve to move away from its rest position;
• and
• wherein when fluid stops flowing out of the pump, the inline suck-back valve moves back to its rest position and draws residual fluid in the outlet passage back.

A refill unit comprising:

• a container;
• a foam pump secured to the container;
• an outlet passage downstream of the foam pump;
• an inline suck-back valve located in the outlet passage;
• the inline suck-back valve having a sealing member;
• a first portion of the outlet passage engages with the sealing member and fluid cannot pass by the sealing member when the sealing member is located in the first portion of the outlet passage;
• and
• an outlet;
• wherein movement of the sealing member in the first outlet passage toward the foam pump draws fluid away from the outlet.

A dispenser system:

• a container;
• a pump secured to the container;
• an outlet passage downstream of the pump;
• an inline suck-back valve located in the outlet passage;
• the inline suck-back valve having a sealing member;
• a first portion of the outlet passage engages with the sealing member and fluid cannot pass by the sealing member when the sealing member is located in the first portion of the outlet passage;
• and
• an outlet;
• wherein movement of the sealing member in the first outlet passage toward the foam pump draws fluid away from the outlet.