System and method for syringe engagement with injector

Patent metadata

Field	Value
Publication number	US-11191893-B2
Application number	US-201916253539-A
Country	US
Kind code	B2
Filing date	Jan 22, 2019
Priority date	Jan 31, 2018
Publication date	Dec 7, 2021
Grant date	Dec 7, 2021

Abstract

A fluid injector including an injector housing with at least one syringe port for receiving a syringe, and a locking mechanism associated with the at least one syringe port for securing the syringe within the at least one syringe port. The locking mechanism is configured for engaging at least one syringe retaining member of the syringe to releasably lock the syringe within the at least one syringe port. The at least one syringe retaining member rotationally guides the syringe into self-orienting alignment with the locking mechanism and is rotated by the locking mechanism into fully locked position after axial installation of the syringe into the at least one syringe port. The locking mechanism also axially ejects the syringe from the locking mechanism upon rotation of the syringe during removal.

First claim

The invention claimed is:

1. A medical fluid injector comprising:
an injector housing;
at least one syringe port in the injector housing for receiving a proximal portion of a syringe; and
a locking mechanism associated with the at least one syringe port for releasably locking the syringe within the at least one syringe port by releasably engaging at least one syringe retaining member of the syringe, the locking mechanism comprising:
a locking ring rotatable between a first locked position and a second insertion/removal position for insertion or removal of the syringe from the locking mechanism;
a biasing mechanism for biasing the locking ring in the first locked position; and
at least one second guide member on the locking ring, the at least one second guide member having:
a ramp surface configured for interacting with the at least one syringe retaining member of the syringe to rotate the locking ring from the first locked position to the second insertion/removal position as the syringe is inserted into the at least one syringe port, and
a top surface at a distal end of the ramp surface, the top surface having a first catch and a second catch each protruding distally from the top surface and separated from each other along the top surface,
wherein the second catch has a sloped portion angled in a direction toward the ramp surface.

2. The medical fluid injector of claim 1 , wherein the at least one second guide member on the locking ring interacts with the at least one syringe retaining member of the syringe to rotate the locking ring from the first locked position to the second insertion/removal position when the syringe is rotated while in a syringe locked position in the locking mechanism.

3. The medical fluid injector of claim 2 , wherein the ramp surface of the at least one second guide member interacts with the at least one syringe retaining member of the syringe to axially eject the syringe from the syringe locked position when the locking ring is rotated into the second insertion/removal position.

4. The medical fluid injector of claim 1 , wherein the locking ring further comprises a stop surface at least partially extending from a proximal end of the ramp surface to a distal surface of the locking ring, wherein the stop surface prevents rotation of the syringe relative to the locking mechanism when the syringe is locked within the locking mechanism.

5. The medical fluid injector of claim 1 , wherein the at least one syringe port further comprises a sidewall having a plurality of recesses and at least one first guide member extending radially inward from the sidewall and positioned between each adjacent recess of the plurality of recesses.

6. The medical fluid injector of claim 5 , wherein the at least one first guide member comprises one or more guiding surfaces for guiding the at least one syringe retaining member into self-orienting alignment with the locking ring.

7. The medical fluid injector of claim 5 , wherein the at least one first guide member comprises a first guiding ramp and a second guiding ramp, wherein the first guiding ramp and the second guiding ramp are inclined toward a first adjacent recess and a second adjacent recess, respectively, on each side of the at least one first guide member.

8. The medical fluid injector of claim 5 , wherein the at least one first guide member has a proximal surface for abutting against a base surface of the at least one syringe retaining member when the syringe is locked within the locking mechanism to prevent distal movement of the syringe when locked in the locking mechanism.

9. The medical fluid injector of claim 1 , wherein the biasing mechanism is a spring.

10. The medical fluid injector of claim 1 , wherein the locking mechanism further comprises at least one sensor for detecting an angular position of the locking ring based on an orientation of a sensor pickup on the locking ring relative to the at least one sensor.

11. The medical fluid injector of claim 10 , wherein the at least one sensor is an optical sensor, a Hall Effect sensor, or a combination thereof.

12. The medical fluid injector of claim 10 , wherein the sensor pickup is a magnet.

13. The medical fluid injector of claim 1 , wherein the at least one syringe port comprises a barcode reader system for reading at least one identification tag on the proximal portion of the syringe.

14. A fluid injector comprising an injector housing with at least one syringe port for receiving a syringe, the injector housing comprising:
a locking mechanism associated with the at least one syringe port for securing the syringe within the at least one syringe port, wherein the locking mechanism is configured for engaging at least one syringe retaining member of the syringe to releasably lock the syringe within the at least one syringe port,
wherein the at least one syringe retaining member rotationally guides the syringe into self-orienting alignment with the locking mechanism and axially ejects the syringe from the locking mechanism upon rotation of the syringe, and
wherein the locking mechanism comprises:
a locking ring disposed within the injector housing, the locking ring rotatable between a first locked position and a second insertion/removal position with rotation of the syringe about a longitudinal axis, the locking ring having a ramp surface configured for interacting with the at least one syringe retaining member of the syringe to rotate the locking ring from the first locked position to the second insertion/removal position, a top surface at a distal end of the ramp surface, the top surface having a first catch and a second catch each protruding distally from the top surface and separated from each other along the top surface, wherein the second catch has a sloped portion.

15. The fluid injector of claim 14 , wherein the locking mechanism comprises:
a housing having a central opening configured to receive a proximal end of the syringe; and
a biasing mechanism for biasing the locking ring in the first locked position.

16. The fluid injector of claim 15 , wherein the biasing mechanism is a spring.

17. The fluid injector of claim 15 , wherein the locking mechanism further comprises at least one sensor for detecting an angular position of the locking ring based on orientation of a sensor pickup on the locking ring relative to the at least one sensor.

18. The fluid injector of claim 17 , wherein the at least one sensor is an optical sensor, a Hall Effect sensor, or a combination thereof.

19. The fluid injector of claim 14 , wherein the at least one syringe port further comprises a sidewall having a plurality of recesses and at least one first guide member positioned between each adjacent recess of the plurality of recesses.

20. The fluid injector of claim 19 , wherein the at least one first guide member comprises one or more guiding surfaces for guiding the at least one syringe retaining member into self-orienting alignment with the locking ring.

Assignees

• Bayer Healthcare Llc

Inventors

• Capone Christopher
• Wlodarczyk Jaroslaw

Classifications

• A61M5/14546 Primary

  Front-loading type injectors · CPC title

• A61M2205/6072

  Bar codes · CPC title

• A61M5/3129

  Syringe barrels (A61M5/3205 and A61M5/50 take precedence) · CPC title

• A61M2205/3317

  Electromagnetic, inductive or dielectric measuring means · CPC title

• A61M5/1408

  in parallel, e.g. manifolds, sequencing valves (access sites A61M39/02; tube connectors A61M39/10) · CPC title