Double inlet valve for enhanced pump efficiency

A dispenser for dispensing soap, sanitizer or lotion comprising:

• a housing;
• a container disposed in the housing holding a soap, a sanitizer or a lotion;
• and
• a pump disposed between the container and the nozzle, the pump having:
• a pump inlet in fluid communication with the container;
• a pump chamber in fluid communication with the pump inlet and the pump outlet, wherein the pump chamber is movable between an expanded position and a compressed position;
• a first normally closed check valve located below the container and disposed between the container and the pump;
• the first check valve having a cracking pressure of greater than about 0.5 psi;
• the first normally closed check valve has a cracking pressure that is higher than a head pressure created by fluid in the container;
• a second normally closed check valve located below the container and disposed between the first check valve and the pump;
• the second normally closed check valve having a cracking pressure that is greater than zero and less than about 0.5 psi.

A dispenser for dispensing soap, sanitizer or lotion comprising:

• a housing;
• a container located within the housing holding a soap, a sanitizer or a lotion;
• and
• a first normally closed check valve located downstream of the container;
• the first normally closed check valve is located below the container and has a cracking pressure that is higher than a head pressure created by fluid in the container;
• a second normally closed check valve located below the container and downstream of the first normally closed check valve;
• the second normally closed check valve having a cracking pressure that is greater than zero and lower than cracking pressure of the first normally closed check valve;
• and
• a pump, the pump having:
• a pump inlet downstream of the second normally closed check valve;
• a pump chamber in fluid communication downstream of the pump inlet and a pump outlet;
• wherein the pump chamber is movable between an expanded position and a compressed position.