Paste injector

The paste injector addresses the issue of relative rotation between the syringe and mounting member by using a restricting portion and engagement structure, ensuring secure attachment and preventing leakage, thus facilitating proper alignment and mixing.

WO2026141536A1PCT designated stage Publication Date: 2026-07-02KURARAY NORITAKE DENTAL
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
KURARAY NORITAKE DENTAL
Filing Date
2025-12-25
Publication Date
2026-07-02

AI Technical Summary

Technical Problem

Conventional paste injectors lack a mechanism to prevent relative rotation between the syringe and the mounting member, leading to potential leakage during transportation and improper alignment during use, which can cause paste leakage.

Method used

A paste injector design that includes a syringe with a restricting portion on its outer circumferential surface and a mounting member with an engagement structure that engages with the syringe, allowing for relative rotation recognition and restriction when fixed, using an elastic deformation mechanism.

Benefits of technology

Prevents relative rotation between the syringe and mounting member, ensuring secure attachment and preventing paste leakage during transportation and use, while allowing for accurate alignment and mixing of pastes.

✦ Generated by Eureka AI based on patent content.

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    Figure JP2025045492_02072026_PF_FP_ABST
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Abstract

In order to provide a paste injector capable of causing a relative rotation state between a syringe and an attachment member to be recognized, and restricting the relative rotation between the syringe and the attachment member when the attachment member is in a fixed state with respect to the syringe, the paste injector is provided with: a syringe (3) filled with paste; and a static mixer (7) fixed to the syringe (3) via an engagement structure in which a mixer exterior body (23) and the syringe (3) relatively rotate to engage with each other. A restricting portion (108) is formed on the inner peripheral surface of the mixer exterior body 23, and a restricting protrusion (43a) that engages with the restricting portion (108) by engagement of the engagement structure is formed on the outer peripheral surface of the syringe (3). When the restricting portion (108) and the restricting protrusion (43a) engage with each other, the mixer exterior body (23) elastically deforms.
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