ADMINISTRATION APPARATUS FOR MEDICAL USE

An expansion/compression mechanism of a piston rod assembly is composed of a bush shaft, a first cylindrical piston rod that is screwed with the bush shaft, a second cylindrical piston rod that is screwed with the first piston rod, and a piston rod holding member for housing the bush shaft and these...

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Bibliographische Detailangaben
Hauptverfasser: TAKEUCHI, Yoshiki, IIO, Toshiaki, SUGIMOTO, Hirofumi, MATSUDA, Kouichi, KIKUCHI, Seiji
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:An expansion/compression mechanism of a piston rod assembly is composed of a bush shaft, a first cylindrical piston rod that is screwed with the bush shaft, a second cylindrical piston rod that is screwed with the first piston rod, and a piston rod holding member for housing the bush shaft and these piston rods. Therefore, the piston rods move linearly in multiple stages.