Medical injector systems having an injector plunger that releasably engages a syringe hub upon retraction of the plunger
First Claim
1. A plunger for a syringe for use with a medical injector system, the syringe having a barrel and a hub slidingly engaging the barrel, the plunger comprising:
- an outer surface;
an actuating member disposed at least partially within a longitudinal bore defined in the inside of the outer surface;
a channel extending in a radial direction; and
at least one retention member slideably disposed within the channel to retractably protrude from at least an inner surface to at least above the outer surface,wherein the at least one retention member terminates with an inwardly projection end formed as a curved contacting surface,wherein the retention member is adapted to releasably engage a substantially annular engaging portion on an inner surface of the hub upon retraction of the plunger to permit the hub to be selectively withdrawn along the barrel by the plunger.
3 Assignments
0 Petitions
Accused Products
Abstract
A medical injector system for injecting fluid from a syringe (300) into a patient, the syringe (300) having a barrel (300) and a plunger (310), the plunger (310) comprising an inner surface having an engaging portion (311) adapted to be releasably engaged by a plunger handle (130) which has a retention member (142) adapted to releasably engage the engaging portion (311) of the plunger (310); and a syringe holder comprising a cradle member (200) adapted to receive a barrel (300) of the syringe (300) and a pivotable catch (500) to releasably lock the syringe (300) in the cradle member (200).
144 Citations
19 Claims
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1. A plunger for a syringe for use with a medical injector system, the syringe having a barrel and a hub slidingly engaging the barrel, the plunger comprising:
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an outer surface; an actuating member disposed at least partially within a longitudinal bore defined in the inside of the outer surface; a channel extending in a radial direction; and at least one retention member slideably disposed within the channel to retractably protrude from at least an inner surface to at least above the outer surface, wherein the at least one retention member terminates with an inwardly projection end formed as a curved contacting surface, wherein the retention member is adapted to releasably engage a substantially annular engaging portion on an inner surface of the hub upon retraction of the plunger to permit the hub to be selectively withdrawn along the barrel by the plunger. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A plunger for a syringe for use with a medical injector system, the syringe having a barrel and a hub disposed externally to and slidingly engaging the barrel, the plunger comprising:
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an outer surface; a channel extending in a radial direction; an actuating member disposed at least partially within a longitudinal bore defined in the inside of the outer surface; and a retention member formed as a cam and connected to a distal end of the actuating member, wherein the retention member retractably protrudes in the radial direction from above the outer surface to below the outer surface, wherein the retention member is adapted to maintain an outwardly projecting position above the outer surface and releasably engage a substantially annular engaging portion on an inner surface of the hub upon retraction of the plunger to permit the hub to be selectively withdrawn along the barrel by the plunger, and wherein the actuating member is disposed in a bore offset from the center of the barrel.
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Specification