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Publication number
JPWO2021257667A5
JPWO2021257667A5 JP2022577713A JP2022577713A JPWO2021257667A5 JP WO2021257667 A5 JPWO2021257667 A5 JP WO2021257667A5 JP 2022577713 A JP2022577713 A JP 2022577713A JP 2022577713 A JP2022577713 A JP 2022577713A JP WO2021257667 A5 JPWO2021257667 A5 JP WO2021257667A5
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JP
Japan
Prior art keywords
plunger
catch
piston
engagement
retaining member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2022577713A
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Japanese (ja)
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JP2023530475A (en
JP7662672B2 (en
Publication date
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Priority claimed from PCT/US2021/037574 external-priority patent/WO2021257667A1/en
Publication of JP2023530475A publication Critical patent/JP2023530475A/en
Publication of JPWO2021257667A5 publication Critical patent/JPWO2021257667A5/ja
Priority to JP2025061252A priority Critical patent/JP2025107177A/en
Application granted granted Critical
Publication of JP7662672B2 publication Critical patent/JP7662672B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Claims (13)

シリンジと共に使用するためのプランジャであって、前記プランジャは、
中央長手方向軸を画定し、近位端、遠位端、および前記近位端と前記遠位端とを接続する周方向側壁を有するプランジャ本体と、
前記プランジャ本体に関連付けられ、そこから近位に延在する少なくとも１つの保持部材であって、前記少なくとも１つの保持部材は、
前記プランジャ本体に接続された第１の端部と、
前記第１の端部の近位にあり、前記第１の端部に対して径方向に弾力的に偏向可能な第２の端部と、
前記第２の端部の少なくとも１つのキャッチと、
を備える、少なくとも１つの保持部材と、
を備え、
前記少なくとも１つの保持部材は、前記プランジャがピストンとの係止状態にあるときに流体注入器システムのピストン上のプランジャ係合機構のプランジャ係合スリーブと係合するように構成された外表面を有することができ、
前記少なくとも１つの保持部材は、前記プランジャが前記ピストンとの係止状態にあるときに前記プランジャ係合機構のプランジャ係合ポストと係合するように構成された内表面を有し、
前記少なくとも１つのキャッチは、前記プランジャが、前記ピストンに対する前記プランジャの軸方向移動を防止するために前記ピストンとの係止状態にあるときに、前記プランジャ係合スリーブおよび前記プランジャ係合ポストの一方の係止機能部と固定的に係合するように構成されており、
前記少なくとも１つのキャッチは、前記ピストンに対する前記プランジャの係合中に、前記プランジャ係合スリーブおよび前記プランジャ係合ポストの一方の前記係止機能部の遠位端と固定的に係合するための、前記少なくとも１つのキャッチの近位端の第１の丸みまたは傾斜近位表面と、前記ピストンからの前記プランジャの係合解除中に、前記プランジャ係合スリーブおよび前記プランジャ係合ポストの一方の前記係止機能部の近位端と固定的に係合するための、前記少なくとも１つのキャッチの遠位端の第２の丸みまたは傾斜遠位表面と、を有し、
前記プランジャの係止解除状態において、前記少なくとも１つのキャッチの前記第１の丸みまたは傾斜近位表面および前記第２の丸みまたは傾斜遠位表面は、前記プランジャ係合スリーブおよび前記プランジャ係合ポストの一方の前記係止機能部との前記少なくとも１つのキャッチの屈曲の相互作用により、前記プランジャに対する前記ピストンの軸方向移動時に、前記少なくとも１つの保持部材の前記第２の端部を径方向に偏向させるように構成されている、プランジャ。 1. A plunger for use with a syringe, said plunger comprising:
a plunger body defining a central longitudinal axis and having a proximal end, a distal end, and a circumferential sidewall connecting said proximal end and said distal end;
at least one retention member associated with the plunger body and extending proximally therefrom, the at least one retention member comprising:
a first end connected to the plunger body;
a second end proximal to the first end and resiliently deflectable radially relative to the first end;
at least one catch at the second end;
At least one retaining member comprising:
Equipped with
The at least one retaining member may have an outer surface configured to engage a plunger engagement sleeve of a plunger engagement mechanism on a piston of a fluid injector system when the plunger is in a locked condition with the piston;
the at least one retaining member having an inner surface configured to engage a plunger engagement post of the plunger engagement mechanism when the plunger is in a locked condition with the piston;
the at least one catch is configured to fixedly engage a locking feature of one of the plunger engagement sleeve and the plunger engagement post when the plunger is in a locked condition with the piston to prevent axial movement of the plunger relative to the piston;
the at least one catch having a first rounded or beveled proximal surface at a proximal end of the at least one catch for fixedly engaging a distal end of the locking feature of one of the plunger engagement sleeve and plunger engagement post during engagement of the plunger on the piston, and a second rounded or beveled distal surface at a distal end of the at least one catch for fixedly engaging a proximal end of the locking feature of one of the plunger engagement sleeve and plunger engagement post during disengagement of the plunger from the piston;
A plunger, wherein in an unlocked state of the plunger, the first rounded or beveled proximal surface and the second rounded or beveled distal surface of the at least one catch are configured to radially deflect the second end of the at least one retaining member upon axial movement of the piston relative to the plunger due to bending interaction of the at least one catch with the locking feature of one of the plunger engagement sleeve and the plunger engagement post. 前記少なくとも１つの保持部材は、前記中央長手方向軸の周りに離間した複数の保持部材を備える、請求項１に記載のプランジャ。 The plunger of claim 1, wherein the at least one retaining member comprises a plurality of retaining members spaced about the central longitudinal axis. 前記少なくとも１つの保持部材は、前記中央長手方向軸と平行な方向で近位に延在する、請求項１に記載のプランジャ。 The plunger of claim 1 , wherein the at least one retention member extends proximally in a direction parallel to the central longitudinal axis. 前記プランジャは、前記流体注入器システムの前記ピストンに対する前記プランジャの角度配向にかかわらず、前記プランジャ係合機構と係合するように構成されている、請求項１に記載のプランジャ。 The plunger of claim 1 , wherein the plunger is configured to engage with the plunger engagement mechanism regardless of an angular orientation of the plunger relative to the piston of the fluid injector system . 前記少なくとも１つのキャッチは、前記中央長手方向軸に向かう方向に前記少なくとも１つの保持部材の前記内表面から径方向内向きに突出している、請求項１に記載のプランジャ。 The plunger of claim 1 , wherein the at least one catch projects radially inward from the inner surface of the at least one retaining member in a direction toward the central longitudinal axis. 前記少なくとも１つのキャッチは、前記中央長手方向軸から離れる方向に前記少なくとも１つの保持部材の前記外表面から径方向外向きに突出している、請求項１に記載のプランジャ。 The plunger of claim 1 , wherein the at least one catch projects radially outward from the outer surface of the at least one retaining member in a direction away from the central longitudinal axis. 前記少なくとも１つのキャッチは、前記プランジャが前記ピストンに接続されたときに前記プランジャ係合機構の少なくとも一部を受容するための係止凹部を画定する、請求項１に記載のプランジャ。 The plunger of claim 1 , wherein the at least one catch defines a locking recess for receiving at least a portion of the plunger engagement feature when the plunger is connected to the piston. 前記少なくとも１つのキャッチは、前記中央長手方向軸に向かう方向に前記少なくとも１つの保持部材の前記内表面から径方向内向きに突出し、前記少なくとも１つのキャッチは、前記プランジャが前記ピストンとの係止状態にあるときに、前記プランジャ係合ポストの外表面から径方向内向きに突出する係止溝として成形され得る前記係止機能部内に受容されるように構成されている、請求項１に記載のプランジャ。 The plunger of claim 1, wherein the at least one catch protrudes radially inward from the inner surface of the at least one retaining member in a direction toward the central longitudinal axis, and the at least one catch is configured to be received within the locking feature, which may be shaped as a locking groove protruding radially inward from the outer surface of the plunger engagement post, when the plunger is in an engaged state with the piston . 前記プランジャ本体は、前記遠位端に円錐形状部分を有し、前記近位端に円筒形状部分を有する、請求項１に記載のプランジャ。 The plunger of claim 1 , wherein the plunger body has a conical portion at the distal end and a cylindrical portion at the proximal end. 前記少なくとも１つの保持部材は、前記円錐形状部分の内表面から近位に突出している、請求項９に記載のプランジャ。 The plunger of claim 9 , wherein the at least one retention member projects proximally from an inner surface of the cone-shaped portion. 前記円筒形状部分の内表面から径方向内向きに、または前記円筒形状部分の前記内表面から近位に突出している複数の解放タブをさらに備え、前記複数の解放タブの各々は、前記中央長手方向軸の周りの前記プランジャの回転時に前記ピストンからの前記プランジャの解放を発動させるために前記プランジャ係合スリーブと相互作用するように構成されている、請求項１０に記載のプランジャ。 11. The plunger of claim 10, further comprising a plurality of release tabs projecting radially inward or proximally from an inner surface of the cylindrical portion, each of the plurality of release tabs configured to interact with the plunger engagement sleeve to actuate release of the plunger from the piston upon rotation of the plunger about the central longitudinal axis. 前記複数の解放タブの各々の近位端は尖ったガイド面を有する、請求項１１に記載のプランジャ。 The plunger of claim 11 , wherein a proximal end of each of the plurality of release tabs has a pointed guide surface. 前記プランジャが前記ピストンと係止状態にある場合、前記少なくとも１つのキャッチは前記中央長手軸から離れる方向に、前記少なくとも１つの保持部材の外表面から径方向外向きに突出し、且つ前記少なくとも１つのキャッチは、前記プランジャ係合スリーブの内表面から径方向内向きに突出した係止溝として成形された係止機能部内に受容されるように構成されている、請求項１に記載のプランジャ。2. The plunger of claim 1, wherein when the plunger is in an engaged state with the piston, the at least one catch protrudes radially outward from an outer surface of the at least one retaining member in a direction away from the central longitudinal axis, and the at least one catch is configured to be received within a locking feature shaped as a locking groove protruding radially inward from an inner surface of the plunger engaging sleeve.
JP2022577713A 2020-06-18 2021-06-16 Systems and methods for syringe plunger engagement with an injector - Patents.com Active JP7662672B2 (en)

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EP (1) EP4168065A1 (en)
JP (2) JP7662672B2 (en)
KR (2) KR102716896B1 (en)
CN (1) CN115715207A (en)
AR (1) AR122637A1 (en)
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CA (1) CA3187270A1 (en)
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