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Publication Number
US-12527922-B2
Publication Date
2026-01-20
Expiration Date
Abstract
A system for injecting includes a syringe body having proximal and distal ends, a syringe interior, and a syringe flange at the proximal end thereof. The system also includes a stopper member disposed in the syringe interior. The system further includes a plunger member coupled to the stopper member. The plunger member includes a rotatable member configured to insert the stopper member distally in the syringe interior relative to the syringe body with rotation of the rotatable member. The plunger member further includes a proximal portion proximal of the rotatable member configured to be moved distally to also insert the stopper member distally in the syringe interior relative to the syringe body to eject about microliters of fluid from the syringe interior.
Core Innovation
The invention relates to a system for injecting that uses a syringe body having a syringe interior with a stopper member and a plunger member. The syringe includes a finger flange coupled to the syringe flange, and a rotatable member disposed on the finger flange. The plunger member is configured to be moved distally relative to the rotatable member to further insert the plunger member and the stopper member into the syringe interior relative to the syringe body.
The rotatable member has an opening through which the plunger member is disposed. The rotatable member is configured to travel along a longitudinal axis of the plunger member relative to the syringe body with rotation of the rotatable member. An external stop of the plunger member is positioned proximal of the rotatable member and is configured to move distally relative to the rotatable member to further insert the stopper member.
Embodiments described include microdose injection systems and safety features, including a plunger cap or safety member configured to prevent premature distal movement of the external stop until removed. Further embodiments include de-bubbling concepts by rotating a rotatable member in a vertical position to eject air from the syringe and/or needle, and user feedback features including tactile/audible clicks and visual indicators. Other embodiments refine dosing control using gap sizing and include structural constraints such as stop features and rotation control mechanisms including ratcheting.
Claims Coverage
The provided claim set identifies one independent claim: clm-00001. Across dependent claims, the inventive coverage refines the main injection mechanism by constraining distal movement with a removable plunger cap, limiting access to a plunger-cap opening, specifying an amount associated with distal movement, and adding directional rotation control via ratcheting and internal stop geometry.
Rotatable member advancing a distally moving stopper via external stop
A system for injecting with a syringe body, a stopper member disposed in the syringe interior, a finger flange coupled to the syringe flange, and a plunger member coupled to the stopper member, where the plunger member comprises an external stop proximal of a rotatable member, and the external stop is configured to be moved distally relative to the rotatable member to further insert the plunger member and the stopper member into the syringe interior relative to the syringe body, with a rotatable member having an opening through which the plunger member is disposed and being configured to travel along a longitudinal axis of the plunger member with rotation of the rotatable member.
Removable plunger cap blocking distal movement of the external stop
The system further comprises a plunger cap removably coupled to the rotatable member and configured to prevent distal movement of the external stop relative to the rotatable member.
Opening configured to prevent manual manipulation of the proximal end
The opening through the plunger cap is sized and shaped to prevent manual manipulation of the proximal end of the plunger member from outside of the plunger cap.
Directional rotation control using ratcheting relative to threads
The rotatable member inserts the plunger member and the stopper member coupled thereto distally by rotating relative to proximally directed external threads in a first direction, and includes a ratcheting mechanism preventing rotation relative to the threads in an opposite second direction.
Internal stop geometry limiting proximal movement of the plunger member
The plunger member includes an internal stop distal of the opening in the rotatable member, where the internal stop is sized to prevent passage through the opening and thereby limit proximal movement of the plunger member.
Overall, the claim coverage centers on a syringe injection system in which a rotatable member with an opening advances the stopper via coordinated distal movement of an external stop, with dependent features adding safety prevention of premature distal movement, constraints on manual manipulation, optional quantitative fluid ejection, and rotation-direction control via a ratcheting mechanism, plus internal stop geometry limiting proximal movement.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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