Title of Invention	A FRONT LOADING SYRINGE SUPPORT DEVICE FOR AN ANGIOGRAPHIC INJECTOR
Abstract	The present invention relates to a support device (3) which is adapted to be secured to the front face (4) of the injector, and to position an angiographic syringe (1) having a body (7) that presents an outwardly-directed projection (30), the cross-section of the body at the location of said projection being non-circular. The device which is extended forwards by a cradle (23) for supporting the syringe body, includes an upwardly-open recess (24) that presents firstly a non-circular cross-section that is complementary to a portion of the cross-section of the syringe body at the location of said projection, and secondly an abutment front face for said projection. The recess (24) includes a central portion (31) of circularly-arcuate cross-section, which portion is extended by two diametrically-opposite notches (32) (fig 9)

Title of Invention

A FRONT LOADING SYRINGE SUPPORT DEVICE FOR AN ANGIOGRAPHIC INJECTOR

Abstract

The present invention relates to a support device (3) which is adapted to be secured to the front face (4) of the injector, and to position an angiographic syringe (1) having a body (7) that presents an outwardly-directed projection (30), the cross-section of the body at the location of said projection being non-circular. The device which is extended forwards by a cradle (23) for supporting the syringe body, includes an upwardly-open recess (24) that presents firstly a non-circular cross-section that is complementary to a portion of the cross-section of the syringe body at the location of said projection, and secondly an abutment front face for said projection. The recess (24) includes a central portion (31) of circularly-arcuate cross-section, which portion is extended by two diametrically-opposite notches (32) (fig 9)

Full Text	AN ANGIOGRAPHIC SYRINGE SUPPORT DEVICE AND COMBINATIONS COMPRISING THE DEVICE TOGETHER WITH AN ANGIOGRAPHIC SYRINGE AND AN ANGIOGRAPHIC INJECTOR The present invention relates to a front-loading syringe support device for an angiographic injector, the device being in accordance with the precharacterizing portion of claim 1. The invention relates essentially to the field of injecting contrast media for establishing diagnoses by medical imaging (scanners, magnetic resonance imaging (MRI), and the like). Front-loading syringes are provided, generally at the rear, with at least one projection projecting from their cylindrical body in order to enable them to be releasably secured to the injector or to a support device secured to the front face thereof. The projection may be a plate (see for example WO—A—02/056947) or a pair of diametrically-opposite tabs (see for example WO—A— 97/36635) . Nevertheless, the above arrangements are not entirely satisfactory, either because they do not directly ensure angular positioning of the syringe about its axis, or else because the movement of the syringe on the injector is relatively complex, in particular being of the bayonet type. WO—A—95/13841 uses a support device in accordance with the precharacterizing portion of claim 1, and provides means for fastening the syringe in a single action serving simultaneously to position the syringe angularly about its own axis. Nevertheless, that prior arrangement does not enable the syringe to be disconnected and withdrawn when the pusher is engaged in the body of the syringe. An object of the invention is to eliminate that drawback. To this end, the invention provides a support device as specified above, characterized by the characterizing portion of claim 1. The support device of the invention may include one or more of the characteristics of claims 2 to 4. The invention also provides an angiographic injection device in accordance with claim 5. The invention also provides an angiographic injection system in accordance with claim 6. Other characteristics of the angiographic injection system are described in claims 7 to 9. Examples of embodiments of the invention are described below with reference to the accompanying drawings, in which: • Figure 1 is a fragmentary diagrammatic front view of an angiographic injection system similar to that of the invention, the syringe not being shown; • Figure 2 is a fragmentary longitudinal section view of the Figure 1 system, prior to connecting the syringe, the section being taken on line II-II of Figure 4; • Figure 3 is a rear perspective view of the same system; • Figure 4 is a plan view of the same system seen looking along arrow IV of Figure 2; • Figures 5 and 6 are perspective views of the assembly comprising the syringe, the support device, and the pusher, respectively as seen from behind and front in front, prior to connecting the syringe to the pusher; • Figures 7 and 8 are views analogous respectively to Figures 5 and 6, after the syringe has been connected to the pusher; • Figures 9, 10, and 12 are views of an angiographic injection system in accordance with the invention, respectively as seen from in front, in longitudinal section on line X-X of Figure 12, and from above, after the syringe has been secured to the injector; • Figure 11 is a fragmentary perspective view from behind of the system of Figures 9, 10, and 12, the front face of the injector being omitted; and • Figures 13 to 16 are views corresponding respectively to Figures 9 to 12, after the syringe and the pusher have been disconnected. The angiographic injection system shown in Figures 1 to 8 is essentially constituted by an angiographic syringe 1, an angiographic injector 2, and a syringe support device 3 secured to the front face 4 of the injector. The injector includes a pusher 5 that is movable in translation along its axis X-X under the control of control means 6 that are shown very diagrammatically. Only the front face 4 and the pusher 5 of the injector are shown. The syringe 1 comprises a cylindrical body 7 with a leading portion 8 that converges to an outlet duct 9 fitted with a coupling 10 for a flexible tube 11. The rear end of the body 7 is provided with an outwarldy-directed radial collar 12, that is substantially rectangular in outside shape. A piston or gasket carrier 13 is placed inside the body 7. The front face of the piston is covered in an elastomer gasket 14 and it is conical in shape, being complementary to the front portion 8 of the body of the syringe. The gasket 14 extends rearwards so as to cooperate with friction against the inside wall of the body. The rear face 15 of the piston is plane, and in its center it has a rearwardly-projecting peg 16, in the form of a mushroom of circular section. The front face 4 of the injector is plane. It supports a U-shaped recess 17 having a vertical axis and provided at its base with a circular orifice 18 on the axis X-X, adapted to allow the pusher 5 to pass freely therethrough. The pusher 5, which is mostly of circular section, has a front head 19 of generally rectangular shape with its long sides horizontal. In the top side of this head there is provided a stepped housing 2 0 that is complementary to the bottom half of the peg 16. The support device 3 is constituted by a half-disk 21 defined by a horizontal top surface 22 and extending forwards by a semicylindrical cradle 23 that is upwardly open. The half-disk and the cradle are made as a single piece. Over approximately the rear half of its length, the half-disk 21 includes a rearwardly-open recess 24 of cross-section that is complementary to the cross-section of the bottom half of the plate 12 of the syringe when its long sides are horizontal. The recess 24 is thus define^ by a horizontal bottom face 25, by two facing vertical walls 26, and by a vertical front face 27. The cradle 23 opens out directly into the front face 27. The support device 3 is fastened onto the front face 4 of the injector in such a manner that the axis of the cradle 23 coincides with the axis X-X. The bottom outline of the recess 17 then defines the rear wall of the recess 24, which has the same axial length as the plate 12 of the syringe. The syringe is fastened to the injector as follows. With the pusher 5 in its retracted position as shown in Figures 2 and 3, the bottom long side of the plate 12 of the syringe is placed on the top face of the cradle 23, and the syringe is pushed rearwards. When the plate comes into abutment against the front face 4 of the injector, it lies immediately above the recess 24, and the peg 16 lies immediately above the housing 20 of the pusher. Merely moving the syringe downwards then simultaneously brings the bottom portion of the plate 12 into the recess 24, the bottom portion of the syringe body 7 into the cradle 23, and the botfeqm portion of the peg 16 into the housing 20 (Figures 7 and 8) . Thus, the syringe is prevented from moving in translation by the faces 4 and 27, its body is supported by the cradle 23, and the peg 16 is connected in both driving directions to the head of the pusher 19. No other moving part for securing the syringe is needed. It is thus possible to begin actuating the pusher in operational manner immediately. In order to disconnect the syringe from the injector, it suffices to retract the pusher, to raise the syringe, and then, once the plate is fully extracted from the recess 24, to extract the syringe in a forward direction. The angiographic injection system of Figures 9 to 12 differs from that of Figures 1 to 8 in the following points only. Firstly, the syringe plate is replaced by two diametrically-opposite radial tabs 30. Secondly, the recess 24 of the support device is constituted by a central portion 31 having a circularly-arcuate section extending the inside surface of the cradle 23, and by two diametrically-opposite horizontal notches 32 opening out into the central portion 31 and substantially complementary in shape to the bottom halves of the tabs 30. Each surface 33 for connecting a notch 32 to the central portion 31 is a convex curved surface (Figure 11). The syringe is secured to the injector as described above with reference to Figures 1 to 8, except that it is the bottom surfaces of the two tabs 3 0 that slide on the top surfaces of the cradle 23. Once again, connection of the peg 16 with the pusher head 19 is obtained simultaneously. In order to disconnect, its body 7 is grasped and turned through 90°. One of the tabs 30 then co-operates with the bottom of the notch 31 and then with the associated convex surface 33, which forms a camming slope, thereby causing the syringe to be raised and consequently disconnecting the piston from the pusher. The two tabs are thus brought into a generally vertical plane (Figures 13 to 15) , and the syringe can be simply-pulled away forwards. This variant makes it easier to disconnect the piston from the pusher. Furthermore, the configuration with two tabs and corresponding front abutment surfaces 27 of the support device enable the syringe to be withdrawn forwards even if the pusher is engaged in the syringe body, without there being any need to begin by movinq the pusher over a withdrawal stroke. WE CLAIM : 1. A front-loading syringe support device for an angiographic injector, the device being adapted to be secured to the front face (4) of the injector (2) and to position an angiographic syringe (1) having a body (7) presenting an outwardly-directed projection (30), the cross-section of the body at the location of said projection being non-circular, the device including a recess (24) that is open in a reception direction, in particular upwards, and presents firstly a non-circular cross-section that is complementary to a portion of the cross-section of the syringe body at the location of said projection, and secondly a front face (27) for coming into abutment against said projection, the device being extended forwards by a cradle (23) for supporting the syringe body, the device being characterized in that the recess (24) includes a central portion (31) that is circularly arcuate in cross-section, and that is extended by two diametrically-opposite notches (32), and said central portion (33) extends the inside surface of the cradle (23) 2. The support device as claimed in claim 1, wherein each notch (32) is connected to the central portion (31) via a cam-forming convex curved surface (33) 3. The support device as claimed claims 1 or 2 , wherein the recess (24) is rearwardly open. 4. An angiographic injection device, characterized in that it comprises: an angiographic syringe (1) having a body (7) provided with an outwardly-projecting projection (30), the cross-section of the body at the location of said projection being non-circular, said projection (30) being constituted by two diametrically-opposite tabs, each of which is adapted to be received in one of the notches (32) in such a manner as to be positioned thereby; and a syringe support device (3) as claimed in any one of claims 1 to 3. 5. An angiographic injection system of the type comprising an angiographic injector (2) having an axially-movable pusher (5), at least one angiographic syringe (1) a piston (13) comprising provided with means (16) for releasably coupling with the front head (19) of the pusher, and releasable means for securing the syringe to the front face (4) of the injector, the system being characterized in that it comprises at least one angiographic injector device as claimed in claim 4, the syringe support device (3) being secured to the front face (4) of the injector. 6. The injection system as claimed in claim 5, wherein , starting from the position in which the syringe is secured, the system is arranged in such a manner that turning the syringe through 90° causes it to be lifted by one of the tabs (30) co-operating with the bottom of the associated notch (32) and the piston (13) and the pusher (5) being disconnected, the syringe then being removable in a forward direction even if the pusher is engaged inside the body of the syringe. 7. The angiographic injection system as claimed in claim 6,wherein the support device (3) is in accordance with claim 3, and in that the front face (4) of the injector (2) forms the rear face of the recess (24) 8. The angiographic injection system as claimed in any one of claims 5 to 7, wherein the head (19) of the pusher (5) and the piston (13) comprise between them an undercut peg (16) and a slot (20) that is open in said reception direction or in the opposite direction such that when the pusher is in the retracted position, putting the projection (30) of the syringe (1) into place in the recess (24) by moving in the direction opposite to said reception direction causes the peg (16) to be inserted into the slot (20)

Full Text

AN ANGIOGRAPHIC SYRINGE SUPPORT DEVICE AND COMBINATIONS COMPRISING THE DEVICE TOGETHER WITH AN ANGIOGRAPHIC SYRINGE AND AN ANGIOGRAPHIC INJECTOR
The present invention relates to a front-loading syringe support device for an angiographic injector, the device being in accordance with the precharacterizing portion of claim 1.
The invention relates essentially to the field of injecting contrast media for establishing diagnoses by medical imaging (scanners, magnetic resonance imaging (MRI), and the like).
Front-loading syringes are provided, generally at the rear, with at least one projection projecting from their cylindrical body in order to enable them to be releasably secured to the injector or to a support device secured to the front face thereof. The projection may be a plate (see for example WO—A—02/056947) or a pair of diametrically-opposite tabs (see for example WO—A— 97/36635) .
Nevertheless, the above arrangements are not entirely satisfactory, either because they do not directly ensure angular positioning of the syringe about its axis, or else because the movement of the syringe on the injector is relatively complex, in particular being of the bayonet type.
WO—A—95/13841 uses a support device in accordance with the precharacterizing portion of claim 1, and provides means for fastening the syringe in a single action serving simultaneously to position the syringe angularly about its own axis. Nevertheless, that prior arrangement does not enable the syringe to be disconnected and withdrawn when the pusher is engaged in the body of the syringe.
An object of the invention is to eliminate that drawback.

To this end, the invention provides a support device as specified above, characterized by the characterizing portion of claim 1.
The support device of the invention may include one or more of the characteristics of claims 2 to 4.
The invention also provides an angiographic injection device in accordance with claim 5.
The invention also provides an angiographic injection system in accordance with claim 6.
Other characteristics of the angiographic injection system are described in claims 7 to 9.
Examples of embodiments of the invention are described below with reference to the accompanying drawings, in which:
• Figure 1 is a fragmentary diagrammatic front view of an angiographic injection system similar to that of the invention, the syringe not being shown;
• Figure 2 is a fragmentary longitudinal section view of the Figure 1 system, prior to connecting the syringe, the section being taken on line II-II of Figure 4;
• Figure 3 is a rear perspective view of the same system;
• Figure 4 is a plan view of the same system seen looking along arrow IV of Figure 2;
• Figures 5 and 6 are perspective views of the assembly comprising the syringe, the support device, and the pusher, respectively as seen from behind and front in front, prior to connecting the syringe to the pusher;
• Figures 7 and 8 are views analogous respectively to Figures 5 and 6, after the syringe has been connected to the pusher;
• Figures 9, 10, and 12 are views of an angiographic injection system in accordance with the invention, respectively as seen from in front, in longitudinal section on line X-X of Figure 12, and from above, after the syringe has been secured to the injector;

• Figure 11 is a fragmentary perspective view from behind of the system of Figures 9, 10, and 12, the front face of the injector being omitted; and
• Figures 13 to 16 are views corresponding respectively to Figures 9 to 12, after the syringe and the pusher have been disconnected.
The angiographic injection system shown in Figures 1 to 8 is essentially constituted by an angiographic syringe 1, an angiographic injector 2, and a syringe support device 3 secured to the front face 4 of the injector. The injector includes a pusher 5 that is movable in translation along its axis X-X under the control of control means 6 that are shown very diagrammatically. Only the front face 4 and the pusher 5 of the injector are shown.
The syringe 1 comprises a cylindrical body 7 with a leading portion 8 that converges to an outlet duct 9 fitted with a coupling 10 for a flexible tube 11. The rear end of the body 7 is provided with an outwarldy-directed radial collar 12, that is substantially rectangular in outside shape.
A piston or gasket carrier 13 is placed inside the body 7. The front face of the piston is covered in an elastomer gasket 14 and it is conical in shape, being complementary to the front portion 8 of the body of the syringe. The gasket 14 extends rearwards so as to cooperate with friction against the inside wall of the body. The rear face 15 of the piston is plane, and in its center it has a rearwardly-projecting peg 16, in the form of a mushroom of circular section.
The front face 4 of the injector is plane. It supports a U-shaped recess 17 having a vertical axis and provided at its base with a circular orifice 18 on the axis X-X, adapted to allow the pusher 5 to pass freely therethrough.
The pusher 5, which is mostly of circular section, has a front head 19 of generally rectangular shape with

its long sides horizontal. In the top side of this head there is provided a stepped housing 2 0 that is complementary to the bottom half of the peg 16.
The support device 3 is constituted by a half-disk 21 defined by a horizontal top surface 22 and extending forwards by a semicylindrical cradle 23 that is upwardly open. The half-disk and the cradle are made as a single piece. Over approximately the rear half of its length, the half-disk 21 includes a rearwardly-open recess 24 of cross-section that is complementary to the cross-section of the bottom half of the plate 12 of the syringe when its long sides are horizontal. The recess 24 is thus define^ by a horizontal bottom face 25, by two facing vertical walls 26, and by a vertical front face 27. The cradle 23 opens out directly into the front face 27.
The support device 3 is fastened onto the front face 4 of the injector in such a manner that the axis of the cradle 23 coincides with the axis X-X. The bottom outline of the recess 17 then defines the rear wall of the recess 24, which has the same axial length as the plate 12 of the syringe.
The syringe is fastened to the injector as follows.
With the pusher 5 in its retracted position as shown in Figures 2 and 3, the bottom long side of the plate 12 of the syringe is placed on the top face of the cradle 23, and the syringe is pushed rearwards.
When the plate comes into abutment against the front face 4 of the injector, it lies immediately above the recess 24, and the peg 16 lies immediately above the housing 20 of the pusher.
Merely moving the syringe downwards then simultaneously brings the bottom portion of the plate 12 into the recess 24, the bottom portion of the syringe body 7 into the cradle 23, and the botfeqm portion of the peg 16 into the housing 20 (Figures 7 and 8) .
Thus, the syringe is prevented from moving in translation by the faces 4 and 27, its body is supported

by the cradle 23, and the peg 16 is connected in both driving directions to the head of the pusher 19. No other moving part for securing the syringe is needed.
It is thus possible to begin actuating the pusher in operational manner immediately.
In order to disconnect the syringe from the injector, it suffices to retract the pusher, to raise the syringe, and then, once the plate is fully extracted from the recess 24, to extract the syringe in a forward direction.
The angiographic injection system of Figures 9 to 12 differs from that of Figures 1 to 8 in the following points only.
Firstly, the syringe plate is replaced by two diametrically-opposite radial tabs 30.
Secondly, the recess 24 of the support device is constituted by a central portion 31 having a circularly-arcuate section extending the inside surface of the cradle 23, and by two diametrically-opposite horizontal notches 32 opening out into the central portion 31 and substantially complementary in shape to the bottom halves of the tabs 30. Each surface 33 for connecting a notch 32 to the central portion 31 is a convex curved surface (Figure 11).
The syringe is secured to the injector as described above with reference to Figures 1 to 8, except that it is the bottom surfaces of the two tabs 3 0 that slide on the top surfaces of the cradle 23. Once again, connection of the peg 16 with the pusher head 19 is obtained simultaneously.
In order to disconnect, its body 7 is grasped and turned through 90°. One of the tabs 30 then co-operates with the bottom of the notch 31 and then with the associated convex surface 33, which forms a camming slope, thereby causing the syringe to be raised and consequently disconnecting the piston from the pusher. The two tabs are thus brought into a generally vertical

plane (Figures 13 to 15) , and the syringe can be simply-pulled away forwards.
This variant makes it easier to disconnect the piston from the pusher. Furthermore, the configuration with two tabs and corresponding front abutment surfaces 27 of the support device enable the syringe to be withdrawn forwards even if the pusher is engaged in the syringe body, without there being any need to begin by movinq the pusher over a withdrawal stroke.

WE CLAIM :
1. A front-loading syringe support device for an angiographic injector, the device being adapted to be secured to the front face (4) of the injector (2) and to position an angiographic syringe (1) having a body (7) presenting an outwardly-directed projection (30), the cross-section of the body at the location of said projection being non-circular, the device including a recess (24) that is open in a reception direction, in particular upwards, and presents firstly a non-circular cross-section that is complementary to a portion of the cross-section of the syringe body at the location of said projection, and secondly a front face (27) for coming into abutment against said projection, the device being extended forwards by a cradle (23) for supporting the syringe body, the device being characterized in that the recess (24) includes a central portion (31) that is circularly arcuate in cross-section, and that is extended by two diametrically-opposite notches (32), and said central portion (33) extends the inside surface of the cradle (23)
2. The support device as claimed in claim 1, wherein each notch (32) is connected to the central portion (31) via a cam-forming convex curved surface (33)
3. The support device as claimed claims 1 or 2 , wherein the recess (24) is rearwardly open.
4. An angiographic injection device, characterized in that it comprises:
an angiographic syringe (1) having a body (7) provided with an outwardly-projecting projection (30), the cross-section of the body at the location of said projection being non-circular, said projection (30) being constituted by two diametrically-opposite tabs, each of which is adapted to be received in one of the notches (32) in such a manner as to be positioned thereby; and
a syringe support device (3) as claimed in any one of claims 1 to 3.
5. An angiographic injection system of the type comprising an angiographic injector (2)
having an axially-movable pusher (5), at least one angiographic syringe (1) a piston (13)
comprising provided with means (16) for releasably coupling with the front head (19) of the

pusher, and releasable means for securing the syringe to the front face (4) of the injector, the system being characterized in that it comprises at least one angiographic injector device as claimed in claim 4, the syringe support device (3) being secured to the front face (4) of the injector.
6. The injection system as claimed in claim 5, wherein , starting from the position in which the syringe is secured, the system is arranged in such a manner that turning the syringe through 90° causes it to be lifted by one of the tabs (30) co-operating with the bottom of the associated notch (32) and the piston (13) and the pusher (5) being disconnected, the syringe then being removable in a forward direction even if the pusher is engaged inside the body of the syringe.
7. The angiographic injection system as claimed in claim 6,wherein the support device (3) is in accordance with claim 3, and in that the front face (4) of the injector (2) forms the rear face of the recess (24)
8. The angiographic injection system as claimed in any one of claims 5 to 7, wherein the
head (19) of the pusher (5) and the piston (13) comprise between them an undercut peg (16) and
a slot (20) that is open in said reception direction or in the opposite direction such that when the
pusher is in the retracted position, putting the projection (30) of the syringe (1) into place in the
recess (24) by moving in the direction opposite to said reception direction causes the peg (16) to
be inserted into the slot (20)

Documents:

1694-chenp-2005-abstract.pdf

1694-chenp-2005-claims.pdf

1694-chenp-2005-correspondnece-others.pdf

1694-chenp-2005-correspondnece-po.pdf

1694-chenp-2005-description(complete).pdf

1694-chenp-2005-drawings.pdf

1694-chenp-2005-form 1.pdf

1694-chenp-2005-form 18.pdf

1694-chenp-2005-form 26.pdf

1694-chenp-2005-form 3.pdf

1694-chenp-2005-form 5.pdf

abs-1694-chenp-2005.jpg

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Patent Number

219254

Indian Patent Application Number

1694/CHENP/2005

PG Journal Number

23/2008

Publication Date

06-Jun-2008

Grant Date

28-Apr-2008

Date of Filing

26-Jul-2005

Name of Patentee

SEDAT

Applicant Address

Inventors:

#	Inventor's Name	Inventor's Address
1	BONACCI, Fabrice

PCT International Classification Number

A61G 12/00

PCT International Application Number

PCT/FR2004/000075

PCT International Filing date

2004-01-15

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	03/00927	2003-01-28	France