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

Claim 13:
14. The method according to claim 12,
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 proximally withdrawing the filter-withdrawal shaft out of the internal plunger space comprises rotating the filter-withdrawal shaft and the plunger-space proximal opening with respect to each other so as to (a) cause an initial portion of the proximal withdrawal of the filter-withdrawal shaft out of the internal plunger space, and (b) decouple the female and the male screw threads from each other.