| 摘要 |
The present invention relates to a disposable dispensing system comprising a collapsible container (400) for liquid material and a pump (1) being sealingly connected to the collapsible container (400) for withdrawal of liquid material from the container (400) during collapse thereof, the pump (1) comprising a housing (400) forming a chamber (110) and a dispensing opening (120), wherein the pressure in the chamber (110) may be varied for pumping liquid from the container (400) to the chamber (110), and further from the chamber (110) to a dispensing opening (120), and a regulator (200) being fixedly arranged in the chamber (110) for regulating a flow of liquid between the container (400) and the chamber (110), and between the chamber (110) and the dispensing opening (120), wherein the pump (1) may assume a closed position, in which a volume of liquid is drawn from the container (400) to the chamber (110) by means of a negative pressure created in the chamber (110), and a dispensing position, in which a volume of liquid is drawn from the chamber (110) to the dispensing opening (120). The dispensing system is characterized by the pump (1) consisting of plastic materials; and the pump (1) comprising return means automatically returning the pump (1) from said dispensing position to said closed position, whereby the return means uses the resiliency of said plastic material for overcoming a negative pressure created in the collapsible container (400) during emptying thereof.
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