JPWO2020065010A5

JPWO2020065010A5 -

Info

Publication number: JPWO2020065010A5
Application number: JP2021516788A
Authority: JP
Publication date: 2022-09-05

Claims

A safety syringe,
a barrel having a hole at one end thereof;
a bung positioned on the barrel, the bung creating a space between the aperture and the bung;
a handle portion secured to the barrel;
A syringe plunger slidably engaged with the handle portion and movable within the barrel on an inward stroke, the syringe plunger displacing the stopper within the barrel such that material within the space is expelled through the bore. forward moving syringe plunger;
a rotation mechanism configured to rotate the syringe plunger within the barrel at a point during the inward stroke at which the syringe plunger contacts the bung such that a rotational force is applied to the barrel;
a brake coupled to the handle portion and configured to provide a frictional force that resists rotational forces applied to the barrel ;
A safety syringe, wherein the handle portion is configured to hold the brake directly or indirectly against the barrel .

2. The safety syringe of claim 1 , wherein the brake is configured to apply a frictional force to sidewalls of the barrel.

3. The safety syringe of claim 1 or 2 , wherein the brake forms at least part of an opening in the handle portion in which the barrel is received.

4. The safety syringe of Claim 3 , wherein the brake forms at least a portion of the inner perimeter of the opening.

5. The safety syringe of claim 3 or 4 , wherein the barrel is received within the opening such that an interference fit is formed between the barrel and the brake.

A safety syringe according to any preceding claim, wherein the brake comprises an elastomeric grommet.

before the barrel is received within the opening, the diameter of the opening is greater than the diameter of the barrel of the safety syringe ;
Claim 6 when dependent directly or indirectly from any of claims 3 to 5 , characterized in that said brake is operable when said barrel is received in said opening. safety syringe.

The grommet interacts with the barrel and/or the handle portion and contacts the side wall of the barrel by pressing the grommet by a flange of the barrel and/or moving the grommet laterally. 8. The safety syringe of claim 6 or 7 , wherein the safety syringe is configured to actuate the brake by activating.

wherein the handle portion comprises a reactive surface configured to compress and/or move the grommet laterally upon application of an axial force to the grommet relative to the handle portion; 9. The safety syringe of claim 8 , characterized by:

10. The safety syringe of claim 9 , wherein the reaction surface is angled to displace the grommet laterally inwardly upon axial movement of the grommet relative to the handle portion.

the reaction surface is configured to resist axial movement of the grommet relative to the handle portion, whereby axial forces applied to the grommet push and/or laterally expand the grommet; 11. Safety syringe according to claim 9 or 10, characterized in that:

12. Any one of claims 9 to 11, wherein the rear surface of the grommet is configured to contact a flange of the barrel when the barrel is received within the opening. Safety syringe as described.

13. The safety syringe of claim 12 , wherein the rear face of the grommet extends from the rear end of the opening.

The handle portion includes a bottoming surface configured to contact a flange of the barrel when the barrel is received within the opening to prevent forward movement of the barrel. Item 1-2 or 1-3 safety syringe.

the handle portion is operable to open the opening;
A safety syringe according to any one of claims 7 to 14 , further operable to close said opening after inserting said barrel into said opening in order to activate said brake. .

16. The safety syringe of Claim 15 , wherein the handle portion comprises two portions separable to open the opening.

17. The safety syringe of claim 16 , wherein the two parts are connected by a hinge.

9. The safety syringe of Claim 8 , wherein the safety syringe further comprises an insert mateable with the handle portion and configured to actuate the brake.

19. According to claim 18 , the insert comprises one or more lateral displacement features configured to interact with the grommet to displace the grommet laterally inward. Safety syringe as described.

20. The safety syringe of claim 18 or 19 , wherein the brake contacts the rear surface of the barrel.

21. The safety syringe of Claim 20, wherein the insert is configured to hold the brake against the rearward surface of the barrel.

The safety syringe is
a safety plunger longitudinally coupled to said syringe plunger such that an inward stroke of said safety plunger causes said inward stroke of said syringe plunger;
a sheath directly or indirectly slidably engaged with the handle portion and configured to at least partially cover the bore of the barrel ;
The safety plunger is configured to longitudinally couple to the sheath at a first point on the inner stroke, and the inner plunger is configured to longitudinally move independently of the syringe plunger such that the safety plunger is longitudinally movable independently of the syringe plunger. configured to longitudinally separate from the syringe plunger at a second point in the lateral stroke;
A safety syringe according to any preceding claim, wherein further movement of the safety plunger after longitudinal separation causes the sheath to at least partially cover the bore of the barrel. .

Prior to operation of the safety syringe, the safety plunger is longitudinally separated from the sheath and configured to longitudinally couple to the sheath at a first point on the inward stroke. The safety syringe of claim 22.

24. The safety syringe of claim 22 or 23 , wherein a rotational force is applied to the barrel after the safety plunger and the syringe plunger are longitudinally separated.

The rotation mechanism comprises a first thread on the safety plunger and a second thread on the syringe plunger and configured to engage the first thread and extends longitudinally. 25. The safety syringe of any of claims 22-24 , wherein movement of the safety plunger after separation causes the syringe plunger to rotate .

26. The safety syringe of claim 25 , wherein the rotating mechanism is further configured to control the speed of movement of the safety plunger after longitudinal separation.

A safety syringe device for use with a syringe, said syringe having a barrel having a hole at one end thereof, and a stopper positioned in said barrel to create a space between said hole and said stopper. wherein the safety syringe device comprises:
a handle portion that secures to the barrel;
A syringe plunger slidably engaged with the handle portion and movable within the barrel on an inward stroke when the handle portion is secured to the barrel, wherein the material in the space extends from the bore. a syringe plunger configured to move the bung forward within the barrel such that the
a rotation mechanism configured to rotate the syringe plunger within the barrel at a point during the inward stroke at which the syringe plunger contacts the bung such that a rotational force is applied to the barrel;
a brake coupled to the handle portion and configured to provide a frictional force that resists rotational forces applied to the barrel ;
A safety syringe device , wherein the handle portion is configured to hold the brake directly or indirectly against the barrel .

A kit of parts forming an instrument for use with a syringe, said syringe having a barrel having an aperture at one end thereof and a stopper positioned in said barrel, said aperture leaving a space between said stopper. the kit of parts comprising:
a handle portion that secures to the barrel;
A syringe plunger slidably engaged with the handle portion and movable within the barrel on an inward stroke when the handle portion is secured to the barrel, wherein the material in the space extends from the bore. a syringe plunger configured to move the bung forward within the barrel such that the
a rotation mechanism configured to rotate the syringe plunger within the barrel at a point during the inward stroke at which the syringe plunger contacts the bung such that a rotational force is applied to the barrel;
a brake connectable to the handle portion and configured to provide a frictional force that resists rotational forces applied to the barrel ;
A kit of parts , wherein the handle portion, when secured to the barrel, is configured to hold the brake directly or indirectly against the barrel .

parts kit is
a safety plunger configured to be longitudinally coupled to the syringe plunger such that an inward stroke of the safety plunger causes the inward stroke of the syringe plunger ;
a sheath configured to at least partially cover the bore of the barrel ;
The safety plunger is configured to longitudinally couple to the sheath at a first point on the inner stroke, and the inner plunger is configured to longitudinally move independently of the syringe plunger such that the safety plunger is longitudinally movable independently of the syringe plunger. configured to longitudinally separate from the syringe plunger at a second point in the lateral stroke;
29. The kit of parts of claim 28 , wherein further movement of the safety plunger after longitudinal separation causes the sheath to at least partially cover the bore of the barrel.