초록 ▼

A pump for metering a liquid is disclosed comprising a flexible tube connected to a container with a pressure relief valve located in the flexible tube. A housing defines an aperture for receiving the flexible tube with a compression surface located adjacent to the aperture. A reciprocating member h

A pump for metering a liquid is disclosed comprising a flexible tube connected to a container with a pressure relief valve located in the flexible tube. A housing defines an aperture for receiving the flexible tube with a compression surface located adjacent to the aperture. A reciprocating member has a sealing element and a pumping element. A drive moves the sealing element for pinching the flexible tube against the compression surface upstream from the pressure relief valve for trapping liquid between the sealing element and the pressure relief valve. The drive moves the pumping element for collapsing the flexible tube against the compression surface for pumping the trapped liquid to discharge a metered quantity of the liquid from the pressure relief valve.

대표청구항 ▼

What is claimed is: 1. A pump for metering a liquid from a container, comprising:a flexible tube extending between a first and a second tube end with said first tube end connected to the container;a pressure relief valve located in said flexible tube;a pump housing having a pump housing aperture for

What is claimed is: 1. A pump for metering a liquid from a container, comprising:a flexible tube extending between a first and a second tube end with said first tube end connected to the container;a pressure relief valve located in said flexible tube;a pump housing having a pump housing aperture for receiving said flexible tube;a compression surface located adjacent to said pump housing aperture;a reciprocating member having a pumping element with a void defined in said pumping element;a sealing element slidably located in said void;a spring mounted on said pumping element for interacting between said pumping element and said sealing member for urging said sealing element to extend beyond said pumping element;a drive moving said sealing element for pinching said flexible tube against said compression surface through a compression of said spring upstream from said pressure relief valve for trapping liquid between said sealing element and said pressure relief valve; andsaid drive moving said pumping element for collapsing said flexible tube against said compression surface for pumping said trapped liquid to discharge a metered quantity of the liquid from said pressure relief valve.