Patent ID: 9623349
Date: 2017-04-18
CPC Classifications: B01D,B01L,G01N

Claim:
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.