Apparatus for testing filterable solids content in liquids

Claim 1

Apparatus for testing the amount of filterable solids in a liquid sample, said apparatus comprising, in combination: a. a first receptacle having side and bottom walls and an open top for receiving a liquid test sample; b. a second receptacle having top, bottom and side walls defining a closed interior connected to means for applying a subatmospheric pressure thereto; c. mutual engagement means on said first and second receptacles for releasably assembling the two in predetermined relation with said first receptacle bottom wall and said second receptacle top wall in spaced, opposing relation with an essentially airtight space defined therebetween; d. each of said receptacles having an opening in opposing walls, the two openings being of substantially the same diameter and in alignment to place the two receptacles in communication when said receptacles are in said predetermined relation; e. said first receptacle having a lip surrounding the opening therein extending toward said top wall of said second receptacle when said receptacles are in said predetermined relation, whereby said airtight space is annular about said lip; and f. at least one additional opening in said top wall of said second receptacle through which the interior of said second container communicates with said annular space, whereby the subatmospheric pressure is applied through said additional opening to said annular space to urge said receptacles toward mutual engagement.