System and method for syringe plunger engagement with an injector
First Claim
1. A plunger for use with a syringe, the plunger comprising:
- a plunger body having a proximal end, a distal end, and a circumferential sidewall extending between the proximal end and the distal end along a plunger longitudinal axis;
at least one resiliently deflectable retaining member having a first segment attached to the plunger body and a second segment protruding from the first segment toward the distal end of the plunger body and deflectable relative to the first segment; and
at least one actuation member associated with the at least one resiliently deflectable retaining member,wherein the at least one actuation member interacts with a piston used to engage the plunger to deflect the at least one resiliently deflectable retaining member upon rotation of the plunger relative to the piston during disengagement of the plunger from the piston.
1 Assignment
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Accused Products
Abstract
A plunger for use with a syringe has a plunger body with a proximal end, a distal end, and a circumferential sidewall extending between the proximal end and the distal end along a plunger longitudinal axis. The plunger further has at least one resiliently deflectable retaining member having a first segment attached to the plunger body and a second segment protruding toward the distal end of the plunger body and deflectable relative to the first segment. The plunger further has at least one actuation member associated with the at least one resiliently deflectable retaining member. The at least one actuation member interacts with a piston to deflect the at least one resiliently deflectable retaining member upon rotation of the plunger relative to the piston. The plunger is engagable with the piston regardless of a rotational orientation of the piston relative to the plunger.
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Citations
30 Claims
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1. A plunger for use with a syringe, the plunger comprising:
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a plunger body having a proximal end, a distal end, and a circumferential sidewall extending between the proximal end and the distal end along a plunger longitudinal axis; at least one resiliently deflectable retaining member having a first segment attached to the plunger body and a second segment protruding from the first segment toward the distal end of the plunger body and deflectable relative to the first segment; and at least one actuation member associated with the at least one resiliently deflectable retaining member, wherein the at least one actuation member interacts with a piston used to engage the plunger to deflect the at least one resiliently deflectable retaining member upon rotation of the plunger relative to the piston during disengagement of the plunger from the piston. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A plunger for use with a syringe, the plunger comprising:
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a plunger body having a proximal end, a distal end, and a circumferential sidewall extending between the proximal end and the distal end along a plunger longitudinal axis; at least one resiliently deflectable retaining member having a first segment attached to the plunger body and a second segment protruding from the first segment toward the distal end of the plunger body and deflectable relative to the first segment; and at least one alignment member associated with the plunger body or the at least one resiliently deflectable retaining member, wherein the at least one alignment member guides a piston into self-orienting alignment with the plunger during engagement of the plunger with the piston. - View Dependent Claims (23, 24, 25, 26)
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27. A plunger for use with a syringe, the plunger comprising:
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a plunger body having a proximal end, a distal end, and a circumferential sidewall extending between the proximal end and the distal end along a plunger longitudinal axis; at least one resiliently deflectable retaining member having a first segment attached to the plunger body and a second segment deflectable relative to the first segment; at least one alignment member associated with the plunger body or the at least one resiliently deflectable retaining member; and at least one actuation member associated with the at least one resiliently deflectable retaining member, wherein the at least one alignment member guides a piston into self-orienting alignment with the plunger during engagement of the plunger with the piston, and wherein the at least one actuation member interacts with the piston to deflect the at least one resiliently deflectable retaining member upon rotation of the plunger relative to the piston during disengagement of the plunger from the piston. - View Dependent Claims (28, 29)
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30. A syringe comprising:
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a barrel having a barrel proximal end, a barrel distal end having a discharge nozzle, and a barrel sidewall extending between the barrel proximal end and the barrel distal end; and a plunger slidably disposed within the barrel and reciprocally movable between the barrel proximal end and the barrel distal end, the plunger comprising; a plunger body having a proximal end, a distal end, and a circumferential sidewall extending between the proximal end and the distal end along a plunger longitudinal axis; at least one resiliently deflectable retaining member having a first segment attached to the plunger body and a second segment protruding from the first segment toward the distal end of the plunger body and deflectable relative to the first segment; and at least one actuation member associated with the at least one resiliently deflectable retaining member, wherein the at least one actuation member interacts with a piston used to engage the plunger to radially deflect the at least one resiliently deflectable retaining member upon rotation of the plunger relative to the piston during disengagement of the plunger from the piston.
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Specification