초록 ▼

A greatly simplified improved vacuum filter funnel consists of two pieces, namely an upper reservoir member and a lower spout member. The upper reservoir member has an annular ring downwardly extending from the bottom thereof which fits inside an annular rim upwardly extending from the top of the lo

A greatly simplified improved vacuum filter funnel consists of two pieces, namely an upper reservoir member and a lower spout member. The upper reservoir member has an annular ring downwardly extending from the bottom thereof which fits inside an annular rim upwardly extending from the top of the lower spout member. A filter disk rests on an integral grid at the top of the lower spout member and is held in place between the upper and lower members by solely the weight of the upper member. The filter disk is readily removed after simply lifting up the upper reservoir member. Both the reservoir and spout members are preferably constructed of a chemical and heat resistant organic plastic, for example polysulfone, so that the parts may be sterilized in an autoclave.

대표청구항 ▼

A filter funnel comprising (I) an upper reservoir member having a downwardly extending vertical annular ring positioned on top of (II) a lower spout member having a central grid for supporting a filter disk and a flat annular area surrounding the central grid, said upper reservoir member and said lo

A filter funnel comprising (I) an upper reservoir member having a downwardly extending vertical annular ring positioned on top of (II) a lower spout member having a central grid for supporting a filter disk and a flat annular area surrounding the central grid, said upper reservoir member and said lower spout member sealing a filter disk placed therebetween during use solely due to the weight of the upper reservoir member and without clamps or magnets or any other retaining device to hold the upper reservoir member and the lower spout member together to maintain the downwardly extending vertical annular ring of the upper reservoir member in sealed contact with the filter disk which filter disk is maintained in sealed contact with the flat annular area of the lower spout member.