Title:
NEEDLELESS SYRINGE
Document Type and Number:
WIPO Patent Application WO/2024/058131
Kind Code:
A1
Abstract:
[Problem] To provide a needless syringe that is capable of, with an easy operation thereof, continuously administrating a certain amount of liquid across a plurality of administrations, each at a prescribed amount, and improves convenience at the time of use. [Solution] A piston 10 and a pressing member 18 that presses a plunger 22 that pushes out a liquid 20 of a liquid accommodating body 4 are reciprocatably provided in a cylinder 28. A gas 12 filled in a gas supply unit 14 is introduced into an airtight space 42 by an open action of a valve mechanism 16 interlocked with a pressing of a second operation lever 90 on an upper side, moving the piston 10 and pressing the pressing member 18. When a liquid injection based on a certain stroke S is completed, the gas 12 in the airtight space 42 is emitted outside a casing 8 by a gas emission mechanism 26. Thereafter, the piston 10 and the pressing member 18 reciprocate, and, by using the pressing face changing mechanism 24, the pressing member 18 including a plurality of pressing faces Pf differing in position in an axial direction is rotated to a prescribed angle and the pressing face Pf is changed.
Inventors:
HAZAWA MANABU (JP)
Application Number:
PCT/JP2023/033074
Publication Date:
March 21, 2024
Filing Date:
September 11, 2023
Export Citation:
Assignee:
MITAKA HDGS CO LTD (JP)
International Classes:
A61M5/30; A61M5/315
Foreign References:
| JP2020179038A | 2020-11-05 | |||
| JPS5187390A | 1976-07-30 | |||
| US20040158196A1 | 2004-08-12 |
Attorney, Agent or Firm:
KAIZUKA, Ryohei (JP)
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