JP5491489B2 - 管状ピストン、保持カップ、及びフィルタを有するフィルタバイアル装置、フィルタバイアルアセンブリ、並びにフィルタバイアル用ピストンの形成方法 - Google Patents
管状ピストン、保持カップ、及びフィルタを有するフィルタバイアル装置、フィルタバイアルアセンブリ、並びにフィルタバイアル用ピストンの形成方法 Download PDFInfo
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Description
Claims (20)
- 長手軸を有するとともに、該長手軸に沿ってピストンを前進させることにより管状バイアルから前記ピストン内へ流体を濾過するためのフィルタバイアル装置であって、
閉塞下端、開放上端、及び直径(D)を備えた円柱状内部を画定する壁部を有する管状バイアルと、
互いに反対側に位置する先端部及び基端部を備えた管状のピストンであって、少なくとも該先端部が開放しており、該ピストンは、該ピストンの先端部付近に外側対向凹部を備えた円柱状内部を画定し、該ピストンは更に、該ピストンの先端部に或いはそれに隣接して、且つ、該ピストンから外方に延出する先端ピストンフランジを有するピストンと、
前記ピストンの先端部において、該ピストンの内部に配置されるフィルタ支持体と、
保持カップであって、該保持カップは、該保持カップの基端部及び先端部の間に連続して延在する側壁を有し、内径が前記先端ピストンフランジの外径よりも小さく且つ前記保持カップの先端部において長手軸へ向けて内方に延出する縁部を有し、該保持カップが更に、該保持カップの基端部から前記直径(D)よりも大きい距離で外方に延出する基端カップシールを有し、該カップの側壁は、該保持カップが前記先端ピストンフランジの上方を通過した時に、前記先端ピストンフランジの位置において、前記直径(D)よりも大きく拡径して先端液密カップシールを形成するために、前記保持カップが前記先端ピストンフランジ上を通過するにつれて外方に変形する程十分な可撓性を有する、保持カップと、
前記保持カップの基端部が前記ピストンの先端部上に載置された時に、該保持カップの縁部及び該ピストン先端部の間に載置されるフィルタと
を備えるフィルタバイアル装置。 - 前記ピストン及び前記保持カップは、前記基端カップシールの位置及び前記先端ピストンフランジの位置において、前記保持カップが前記バイアルの内部と当接すると共に該内部と共に流体シールを形成するように、前記フィルタバイアルの開放端部を通して載置される、請求項1に記載のフィルタバイアル装置。
- 前記ピストンの先端部は先端縁を有し、リブが該先端縁上にあり、該リブが、前記ピストンの周囲に延在すると共に、使用の間に、前記フィルタを前記カップの縁部に押し付けるように、使用の間に該フィルタと当接するように配向される、請求項1に記載のフィルタバイアル装置。
- 前記縁部は、前記保持カップの内周に連続的に延在し、陥凹領域が前記ピストンの全周に延在する、請求項1に記載のフィルタバイアル装置。
- 前記ピストン、前記バイアル及び前記保持カップがポリマからなる、請求項1に記載のフィルタバイアル装置。
- 前記ピストンの基端部上に解放可能であるが、密着して嵌るようなサイズに形成されたキャップを更に含む請求項1に記載のフィルタバイアル装置。
- 前記基端カップシールが前記ピストンの前記凹部の端と当接する、請求項2に記載のフィルタバイアル装置。
- 前記ピストンの基端部の近傍において、該ピストンから外方に延出すると共に、該ピストンの先端部が前記バイアルの下端付近にある時に、該バイアルと係合すると共に、液密シールを形成するように配置される基端シールを更に備える請求項2に記載のフィルタバイアル装置。
- 前記先端ピストンフランジが、前記先端液密カップシールの基端部においてより大きく、且つ該先端液密カップシールの先端部においてより小さい三角形の断面形状を有する、請求項1に記載のフィルタバイアル装置。
- フィルタバイアルアセンブリであって、
中空管状のピストンを内部に有するとともに、閉塞下端及び開放上端を備えた円柱状包囲バイアルであって、該ピストンが、基端カップシールを有するカップによって被覆される先端部を有し、該基端カップシールは、該基端カップシールを前記バイアルの壁部と係合させるのに十分な距離だけ、該ピストンが該バイアルを前進する時に、液密シールを形成するために、該バイアルの壁部と係合し、前記ピストンの先端部はピストンフランジを有し、該ピストンフランジは、前記カップが該ピストンフランジ上でスナップ嵌合を形成すると共に、凹部まで延出するように、外方に延出すると共に、該ピストンの凹部付近に配置されており、前記ピストンフランジは、該フランジ及び前記カップが前記バイアルに挿入された時に、該バイアルと共に先端液密カップシールを形成するのに十分な程の可撓性を有する前記カップの側壁を外方へ膨出する、バイアルと、
前記カップの内方延出縁部と当接する周縁を有すると共に、前記ピストン先端部のピストン支持体及び前記縁部の間に保持されるフィルタと
を備えるフィルタバイアルアセンブリ。 - 前記カップの先端部において、前記フィルタと当接するカップ支持体を更に含む請求項10に記載のフィルタバイアルアセンブリ。
- 前記ピストンの基端部付近において、前記バイアルの円柱状壁部と係合させられる時に、液密シールを形成するように寸法が決められると共に構成される外方に延出する基端シールを更に含む請求項10に記載のフィルタバイアルアセンブリ。
- 前記ピストンの先端部は、リブを備えた先端縁を有し、該リブが該先端部から延出すると共に、前記フィルタを前記カップの縁部に押し付けるように配向される、請求項11に記載のフィルタバイアルアセンブリ。
- 前記ピストンの基端部を被覆する取り外し可能なキャップを更に含む請求項10に記載のフィルタバイアルアセンブリ。
- 前記ピストンの壁部を通り延在すると共に、該ピストンの基端部及び前記ピストンフランジの先端付近において、前記基端シールの近傍に配置される通気穴を更に含む請求項12に記載のフィルタバイアルアセンブリ。
- フィルタバイアル用ピストンの形成方法であって、該ピストンは、互いに反対側に位置する基端部及び先端部を備えた円柱状管を有し、
前記ピストンの先端部において、外方延出ピストンフランジを形成する工程と、
前記ピストンの先端部において、且つ前記ピストンフランジに隣接して、且つ該ピストンフランジの基端側上に、該ピストン先端部の周縁に円柱状凹部を形成する工程と、
保持カップの下部にフィルタを載置する工程と、該カップは、前記ピストンの先端上に嵌合するようなサイズに形成され、該保持カップは、開放基端部と、対向する先端部に内方延出縁部とを有し、該縁部は、前記フィルタの周縁と当接しており、
前記カップの基端部及び前記ピストンの凹部の間にスナップ嵌合を形成するために、該ピストンの先端部及び前記ピストンフランジ上に、該カップの開放基端部を載置すると共に、前記ピストンの先端部が前記フィルタと当接するまで、前記保持カップを該ピストンに沿って前進させる工程とを含み、該保持カップは、前記基端部において、使用の間に前記フィルタバイアルの内部と密封係合するようなサイズに形成された外方に延出する基端カップシールを有し、該保持カップは、前記ピストンフランジにおいて、該ピストンフランジと共に外方に膨出するのに十分な程、可撓性を有する材料から作られており、該保持カップは、使用の間に、前記フィルタバイアルの壁部と共に先端液密カップシールを形成するのに十分な距離だけ外方に延出するようなサイズに形成される、フィルタバイアル用ピストンの形成方法。 - 前記保持カップの先端部に、フィルタ支持体を供給する工程を更に含み、該フィルタ支持体が、使用の間に、前記フィルタと当接するように配置される、請求項16に記載のフィルタバイアル用ピストンの形成方法。
- 前記ピストンの先端部にピストンフィルタ支持体を供給する工程を更に含み、該ピストンフィルタ支持体が、使用の間に、前記フィルタと当接するように配置される、請求項16に記載のフィルタバイアル用ピストンの形成方法。
- 前記ピストンの先端部にピストンフィルタ支持体を供給する工程を更に含み、該ピストンフィルタ支持体が、使用の間に、前記フィルタと当接するように配置される、請求項17に記載のフィルタバイアル用ピストンの形成方法。
- 前記ピストンの先端縁上において、前記フィルタの周縁に軸方向対向シールを形成するように配置されるリブを更に含む請求項17に記載のフィルタバイアル用ピストンの形成方法。
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