초록 ▼

A membrane filter pipette tip comprising a hollow tube having a relatively large open upper end for seating on a lower end of a pipette tip mounting shaft of a pipette device and having a relatively small lower open end for passing fluid into the lower end of the tube upon operation of the pipette d

A membrane filter pipette tip comprising a hollow tube having a relatively large open upper end for seating on a lower end of a pipette tip mounting shaft of a pipette device and having a relatively small lower open end for passing fluid into the lower end of the tube upon operation of the pipette device in an aspiration mode. A porous membrane is secured by a porous plug within the tube across an open channel within the tube extending between the open upper and lower ends thereof and having a fluid initiation/penetration pressure which is greater than the maximum vacuum pressure which the pipette device to which the tube is secured is capable of generating.

대표청구항 ▼

[ What is claimed is:] [1.] A membrane filter pipette tip comprising:a hollow tube having a relatively large open upper end for seating on a lower end of a pipette tip mounting shaft of a pipette device and a relatively small open lower end for passing fluid into the lower end of the tube upon opera

[ What is claimed is:] [1.] A membrane filter pipette tip comprising:a hollow tube having a relatively large open upper end for seating on a lower end of a pipette tip mounting shaft of a pipette device and a relatively small open lower end for passing fluid into the lower end of the tube upon operation of the pipette device, and an open channel between the upper and lower ends of the tube;a porous membrane within the open channel; andsupport structure comprising a porous plug extending across the channel within the tube and including an upper surface facing the open end of the tube, a lower surface facing the open lower end of the tube and a sidewall engaging an inner surface of the tube and supporting the porous membrane to extend over the lower surface of the plug across the open channel with a marginal edge of the porous membrane secured against an inner surface of the tube by a marginal edge portion of the membrane surrounding a lower portion of an outer sidewall of the plug and being captured between the outer sidewall of the plug and the inner sidewall of the tube.