Viscous product distribution pump, has one lip positioned above another lip and closing air resumption passage when mobile unit is in position of rest and liberating passage when mobile unit is in position of product distribution

摘要

The pump (1) has an air resumption passage between a pump body (14) and a mobile unit (5) and communicating with an opening (18) of the pump body. A lip (40) applies itself in a tight manner to the body after movement of unit (5) in a direction of product distribution. Another lip (41) situated above the lip (40) closes and liberates the passage as the mobile unit is in position of rest and product distribution, respectively. An Independent claim is also included for a container equipped with the pump.