Self-orienting syringe and syringe interface

Patent metadata

Field	Value
Publication number	US-2017304529-A1
Application number	US-201715644214-A
Country	US
Kind code	A1
Filing date	Jul 7, 2017
Priority date	Oct 28, 2014
Publication date	Oct 26, 2017
Grant date	—

Abstract

A medical injector including at least one syringe port for engaging at least one syringe and having a locking mechanism. The locking mechanism enables the syringe to self-align with the syringe port for locking engagement upon insertion of the syringe into the syringe port and to axially eject the syringe from the port upon rotational disengagement of the syringe from the port.

First claim

We claim:

1 . A medical injector comprising at least one syringe port for engaging at least one syringe, the syringe port comprising a locking mechanism comprising:
a housing; and a first retaining ring at a distal end of the housing, the first retaining ring having a central opening and a sidewall, wherein the sidewall has one or more first recesses extending radially outward into the sidewall and lateral surfaces of each first recess defining a travel path for guiding movement of one or more retaining lugs of a syringe, wherein each first recess comprises at least one first guiding surface and a second guiding surface to guide the retaining lug into self-oriented alignment with the first recess.

2 . The medical injector of claim 1 , wherein the at least one first guiding surface and the second guiding surface are inclined radially and axially toward the central opening of the first retaining ring.

3 . The medical injector of claim 1 , wherein the at least one first guiding surface comprises an axial point which separates a first portion of the first guiding surface and a second portion of the first guiding surface, wherein the first portion of the first guiding surface is inclined towards one of the first recesses and the second portion of the first guiding surface is inclined towards a second of the first recesses adjacent to the first recess.

4 . The medical injector of claim 1 , wherein the second guiding surface is radially inclined towards the central opening from a distal end of the second guiding surface to the proximal end of the second guiding surface.

5 . The medical injector of claim 1 , wherein the at least one first guiding surface and the second guiding surface guide the syringe into rotational alignment with the one or more recesses and into axial alignment with the syringe port.

6 . The medical injector of claim 1 , wherein the one or more first recesses are evenly spaced about an inner circumference of the sidewall.

7 . The medical injector of claim 1 , wherein each of the one or more first recesses and the sidewall of the first retaining ring on one radially adjacent side of the first recess define a clearance space for receiving a syringe retaining member on the syringe, wherein the syringe retaining member comprises a lug and an outer surface of a barrel of the syringe on one radially adjacent side of the lug.

8 . A medical injector comprising at least one syringe port for engaging at least one syringe, the syringe port comprising a locking mechanism comprising:
a housing; a first retaining ring at a distal end of the housing, the first retaining ring having a central opening and a sidewall, wherein the sidewall has one or more first recesses extending radially outward into the sidewall and lateral surfaces of each first recess defining a travel path for guiding movement of one or more retaining lugs of a syringe; and a second retaining ring that is rotatable relative to the first regaining ring and the housing, wherein the second retaining ring comprising one or more locking elements extending radially from an inner sidewall of the second retaining ring and are separated by one or more second recesses for receiving the one or more retaining lugs when an insertion section of the syringe is inserted through the central opening of the first retaining ring, wherein the one or more locking elements comprise a first inclined surface for engaging a corresponding inclined surface of the one or more retaining lugs for axially ejecting the syringe upon disengagement of the syringe from the syringe port.

9 . The medical injector of claim 8 , wherein the one or more locking elements further comprise a second inclined surface.

10 . The medical injector of claim 8 , wherein the second retaining ring further comprises at least one elastically resilient member to bias the second retaining ring to a first locked position.

11 . The medical injector of claim 10 , wherein when the syringe is inserted into the syringe port, the inclined surface of the one or more retaining lugs engage the first inclined surface of the one or more locking elements to rotate the second retaining ring from the first locked position to a second insertion or release position to allow the one or more second recesses to receive the one or more retaining lugs and wherein the at least one elastically resilient member returns the second retaining ring to the first locked position after the one or more retaining lugs is received by the one or more second recesses.

12 . The medical injector of claim 10 , wherein rotation of the syringe against a biasing force of the at least one elastically resilient member rotates the second retaining ring from the first locked position to a second insertion or release position to disengage the one or more lugs from the one or more locking elements.

13 . The medical injector of claim 12 , wherein rotation of the syringe causes the inclined surface of the one or more retaining lugs rides up the first inclined surface of the one or more locking elements to axially ejecting the syringe from the syringe port.

14 . A medical injector comprising at least one syringe port for engaging at least one syringe, the syringe port comprising a locking mechanism comprising:
a housing; a first retaining ring at a distal end of the housing, the first retaining ring having a central opening and a sidewall, wherein the sidewall has one or more first recesses extending radially outward into the sidewall and lateral surfaces of each first recess defining a travel path for guiding movement of one or more retaining lugs of a syringe; and a second retaining ring that is rotatable relative to the first regaining ring and the housing, wherein each first recess comprises at least one first guiding surface and a second guiding surface to guide the retaining lug into self-oriented alignment with the first recess, and wherein the second retaining ring comprising one or more locking elements extending radially from an inner sidewall of the second retaining ring and are separated by one or more second recesses for receiving the one or more retaining lugs when an insertion section of the syringe is inserted through the central opening of the first retaining ring, wherein the one or more locking elements comprise a first inclined surface for engaging a corresponding inclined surface of the one or more retaining lugs for axially ejecting the syringe upon disengagement of the syringe from the syringe port.

15 . The medical injector of claim 14 , wherein the at least one first guiding surface comprises an axial point which separates a first portion of the first guiding surface and a second portion of the first guiding surface, wherein the first portion of the first guiding surface is inclined towards one of the first recesses and the second portion of the first guiding surface is inclined towards a second of the first recesses adjacent to the first recess.

16 . The medical injector of claim 15 , wherein the second guiding surface is radially inclined towards the central opening from a distal end of the second guiding surface to the proximal end of the second guiding surface.

17 . The medical injector of claim 16 , wherein the at least one first guiding surface and the second guiding surface guide the syringe into rotational alignment with the one or more recesses and into axial alignment with the syringe port.

18 . The medical injector of claim 14 , wherein the second retaining ring further comprises at least one elastically resilient member to bias the

Assignees

• Bayer Healthcare Llc

Inventors

• Tucker Barry L
• Cowan Kevin P
• Uber Iii Arthur E
• Rhinehart Edward J
• Spohn Michael A

Classifications

• A61M5/14566

  with a replaceable reservoir for receiving a piston rod of the pump · CPC title

• A61M2005/14573

  with a replaceable reservoir for quick connection/disconnection with a driving system · CPC title

• A61M5/145 Primary

  using pressurised reservoirs, e.g. pressurised by means of pistons · CPC title

• A61M5/14546 Primary

  Front-loading type injectors · CPC title

• A61M5/007

  for contrast media · CPC title