Patent ID: 11885722
Assignee: HERO SCIENTIFIC LTD.
Field: Measurement (Instruments)
Classification: CPC G  Y | IPC G

Claim 2:
3. The sampling device according to claim 1,
wherein the plunger-space proximal opening and a longitudinal portion of the filter-withdrawal shaft are shaped so as to define corresponding female and male screw threads, respectively, which (a) removably couple the filter-withdrawal shaft to the plunger rod while the filter-withdrawal shaft is disposed passing through the internal plunger space, and (b) prevent the premature proximal withdrawal of the filter-withdrawal shaft out of the internal plunger space, and
wherein the sampling device is configured such that rotation of the filter-withdrawal shaft and the plunger-space proximal opening with respect to each other (a) causes an initial portion of the proximal withdrawal of the filter-withdrawal shaft out of the internal plunger space, and (b) decouples the female and the male screw threads from each other.