Disposable integrated polymeric vacuum filtration funnel

摘要

This invention discloses a disposable integrated polymeric vacuum filtration funnel. The integrated polymeric vacuum filtration funnel comprises a filtration funnel body having a filter frit disposed inside at the bottom, an outlet stem connected with an outlet at the outer bottom of the filtration funnel body; the outlet stem is integrated with the filtration funnel body; the filter frit is sealed to the inner bottom and the inner side surface of the filtration funnel body; the integrated polymeric vacuum filtration funnel comprises a sealing joint disposed underneath the outer bottom of the filtration funnel body, the sealing joint having a side-arm for vacuum connection and a standard adaptor to connect the receiving receptacle; the outlet stem protrudes from the standard adaptor; the filter frit, filtration funnel body, and sealing joint are integrated as one device. The invention can effectively reduce or eliminate the loss of the filtrate and filter cake, avoid contamination, easy to use, and cost-effective.

主权项

1. A disposable vacuum filtration funnel for use with a vacuum comprising:
a funnel body comprising a bottom wall; an annular step comprising an annular inner side surface extending vertically from said bottom wall; said annular step comprising a top surface extending horizontally from said annular inner side surface; and an annular inner sidewall extending vertically from said annular step; said bottom wall comprising an inner surface having an annular mounting portion; said funnel body comprising an outlet hole in said bottom wall; a filter comprising a bottom surface, an annular side surface, and a top surface; said bottom surface of said filter comprises an annular mounting portion sealed to said annular mounting portion of said inner surface of said bottom wall by a first weld; said annular side surface of said filter being sealed to said annular inner side surface of said annular step by a second weld; said top surface of said filter comprises an annular mounting portion; a press ring sealed to said annular mounting portion of said top surface of said filter by a third weld; said press ring is sealed to said top surface of said annular step by a fourth weld; said press ring is sealed to said inner sidewall of said funnel body by a fifth weld; an outlet stem sealed to said bottom wall of said funnel body and in fluid communication with said outlet hole; and whereby said first, second, third, fourth, and fifth welds form an absolute seal within said filtration funnel body allowing a high suction rate of the media thru said filter without loss of media around said filter.