PLUNGER ASSEMBLY, DRUG SOLUTION DOSAGE DEVICE, AND DRIVING METHOD OF PLUNGER ASSEMBLY

Title:

PLUNGER ASSEMBLY, DRUG SOLUTION DOSAGE DEVICE, AND DRIVING METHOD OF PLUNGER ASSEMBLY

Document Type and Number:

WIPO Patent Application WO/2019/065946

Kind Code:

A1

Abstract:

A plunger assembly (14A) for a drug solution dosage device (10) is provided with: a feed screw (48) that has a male thread part (62) and an extension part (63); a first plunger (50) to which a first female thread part (68a) is provided; a second plunger (52) which has a nut housing part (88); a nut member (54) to which a second female thread part (54a) is provided; and a base part (56) which guides the second plunger (52). The nut housing part (88) houses the nut member (54) in such a manner as to prevent the rotation of the nut member while allowing same to move in the axial direction thereof.

Inventors:

OGAWA JUNICHI (JP)
KONDO AKIRA (JP)
IIBUCHI RURIKO (JP)

Application Number:

PCT/JP2018/036197

Publication Date:

April 04, 2019

Filing Date:

September 28, 2018

Export Citation:

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Assignee:

TERUMO CORP (JP)

International Classes:

A61M5/315; A61M5/142; A61M5/145

Domestic Patent References:

WO2013148270A2

2013-10-03

Foreign References:

JP2015181869A	2015-10-22
JP2015530153A	2015-10-15
JP2014057886A	2014-04-03
US20090326459A1	2009-12-31

Other References: