| 摘要 |
A needle holder device for use in a medical administering injector such as a syringe or dripset, comprising a generally tubular member formed with a liquid conducting passageway consisting of two axially spaced cylindrical bore portions and a frusto-conical bore portion between the cylindrical bore portions, and a filter assembly held in position within one of the cylindrical bore portions and located in proximity to the frusto-conical bore portion, the filter assembly including at least one filter element and filter retaining means formed with open spaces providing communication between the frusto-conical bore portion through the filter element and one of the cylindrical bore portions, the retaining means including at least one conical or otherwise tapered axial projection extending into at least one of the cylindrical bore portions.
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