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Publication Number
US-9925340-B2
Publication Date
2018-03-27
Expiration Date
Abstract
The invention relates to a syringe closure for a syringe having a basic body, a terminal extension that extends from the basic body, which has a free end and a base arranged on the basic body. A recess is provided on the extension at a distance from its free end. The syringe closure for closing off the syringe can be attached in such a way on its extension via its free end that the syringe closure overlaps at least one recess of the extension. The syringe closure is characterized by a locking device having at least one locking element, which assumes a release position in a first functional position after the attachment of the syringe closure on the extension, and ensures a positive engagement with at least one recess on the extension in a second functional position, the locking position, and thus lockingly holds the syringe closure on the extension.
Core Innovation
The invention relates to an apparatus for closing a syringe in which a syringe closure is attached via a free end over a terminal extension of a syringe basic body. The terminal extension extends from the basic body and has a free end, a base, and at least one first recess provided on the terminal extension at a distance from the free end. During attachment, the syringe closure overlaps the at least one first recess of the terminal extension.
The syringe closure includes an open side facing the syringe and a second recess delimited radially inwardly by an inner wall area and radially outwardly by an outer wall area. The inner wall area forms at least one deformable wall so that the syringe closure can deform when acted upon. A locking device with at least one locking element assumes a release position when the locking device is in a first functional position relative to the syringe closure and assumes a locking position after movement to a second functional position.
In the locking position, the at least one locking element ensures a positive engagement with the at least one first recess on the terminal extension and engages into the second recess of the syringe closure from the open side. The locking element lockingly holds the syringe closure on the terminal extension. The locking element interacts with the at least one deformable wall of the syringe closure and presses the inner wall area into the at least one first recess to realize the locking position.
Preferred embodiments described include wedge-shaped locking elements and locking elements configured for axial displacement to create a positive fit with the recesses. Further embodiments describe multiple locking elements connected by an annular supporting element, engaging individual extension recesses or a common annular recess, with wall notches allowing deformation of soft gel-like material accommodated in the second recess. The disclosed approach also addresses low attachment force to avoid glass breakage and reduced material overexpansion to improve durability and retention after sterilization/autoclaving.
Claims Coverage
The partial content provides one independent claim (clm-00001), defining a syringe-closing apparatus with a release-to-locking functional movement and positive engagement into a second recess by locking elements. The claim covers syringe closure overlap with terminal extension recesses and deformation of an inner wall area to realize locking.
Syringe closure overlapping terminal extension recesses
A syringe closure having an open side facing the syringe overlaps at least one first recess of the terminal extension when attached via its free end, where the terminal extension includes the at least one first recess at a distance from the free end.
Second recess with deformable inner wall area
A syringe closure defines a second recess delimited radially inwardly by an inner wall area and radially outwardly by an outer wall area, wherein the inner wall area forms at least one deformable wall.
Release position to locking position functional movement
A locking device having at least one locking element assumes a release position in a first functional position relative to the syringe closure after attachment and assumes a locking position after movement from the first functional position to a second functional position relative to the syringe closure.
Positive engagement into second recess from open side
In the locking position, the at least one locking element ensures a positive engagement with the at least one first recess and engages into the second recess of the syringe closure from the open side to lockingly hold the syringe closure on the terminal extension.
Pressing deformable wall into first recess
In the locking position, the at least one locking element interacts with the at least one deformable wall and presses the inner wall area into the at least one first recess to realize the locking position.
Overall, clm-00001 centers on a two-stage locking concept (release position to locking position) in which locking elements positively engage terminal extension recesses from the open side by entering a second recess, while deforming a deformable inner wall area into the first recess to lock the closure.
Stated Advantages
Low attachment force to avoid glass breakage.
Reduced material overexpansion to improve durability and retention after sterilization/autoclaving.
Documented Applications
Sterilization/autoclaving use is addressed, with improved durability and retention after sterilization/autoclaving explicitly mentioned.
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