Title:
SYRINGE
Document Type and Number:
WIPO Patent Application WO/2023/054503
Kind Code:
A1
Abstract:
In order to provide a metered dose administering member capable of quantification without visual inspection, provided is a metered dose administering member comprising a plunger 107 having a protrusion on the outer surface thereof, and a flange cover 109 covering a flange part 114 of a syringe 111, the flange cover having a hole 116 through which the plunger passes, and a recess 125 which is provided on the inner surface of the hole and through which the protrusion passes. The protrusion has: a first protrusion 115 axially extending to a front end side of the plunger; a second protrusion 117 that axially extends to a rear end side of the plunger and is disposed at a different position than the first protrusion in the circumferential direction; and a continuous protrusion 119 connecting the rear end of the first protrusion and the front end of the second protrusion in a continuous manner. The protrusions pass through the inside of the recess in the order of the second protrusion, the continuous protrusion, and the first protrusion, and the plunger rotates relative to the flange cover when the rear end of the first protrusion passes through the recess.
Inventors:
FUJISAWA TORU (JP)
Application Number:
PCT/JP2022/036244
Publication Date:
April 06, 2023
Filing Date:
September 28, 2022
Export Citation:
Assignee:
TSK LABORATORY JAPAN (JP)
International Classes:
A61M5/315
Domestic Patent References:
| WO2012002398A1 | 2012-01-05 |
Foreign References:
| JP2004049726A | 2004-02-19 | |||
| CN111388806A | 2020-07-10 | |||
| US20020198499A1 | 2002-12-26 |
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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