Syringe with plunger rod having a flexible portion
First Claim
1. A syringe assembly, comprising:
- a syringe barrel having a first end, a second end, and a sidewall extending therebetween and defining a chamber having an interior;
a stopper slidably disposed within the interior of the chamber of the syringe barrel, the stopper sized relative to the interior of the chamber of the syringe barrel to provide sealing engagement with the sidewall of the syringe barrel;
a plunger rod having a first end, a second end, and a rod portion extending therebetween, wherein at least a portion of the rod portion is flexible, wherein the second end of the plunger rod is engaged with the stopper such that movement of the first end of the plunger rod in a first direction moves the stopper in a second direction between a first position in which the stopper is located a first distance from the first end of the syringe barrel, and a second position in which the stopper is located a second distance from the first end of the syringe barrel, the second direction being different than the first direction and the second distance being different than the first distance, and wherein the overall length of the syringe assembly is the same when the stopper is in the first position and the second position; and
an actuator flange disposed at least partially about the syringe barrel and movable alongside the syringe barrel, the actuator flange being connected to the first end of the plunger rod, the actuator flange including a finger flange for facilitating manual movement of the actuator flange with respect to the syringe barrel in the first direction to advance the first end of the plunger rod in the first direction and the second end of the plunger rod in the second direction.
1 Assignment
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Accused Products
Abstract
A syringe assembly including a plunger rod having a first end, a second end, and a rod portion extending therebetween, wherein at least a portion of the rod portion is flexible is disclosed. The flexible portion of the rod portion allows a stopper to be moved between a first position and a second position within a syringe barrel while the overall length of the syringe assembly remains the same throughout the movement between the first position and the second position. In another embodiment, a syringe assembly including a restraining member adapted to communicate with the flexible portion of the rod portion such that movement of the first end of the plunger rod in a first direction actuates movement of the second end of the plunger rod in a second direction different than the first direction is disclosed.
20 Citations
19 Claims
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1. A syringe assembly, comprising:
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a syringe barrel having a first end, a second end, and a sidewall extending therebetween and defining a chamber having an interior; a stopper slidably disposed within the interior of the chamber of the syringe barrel, the stopper sized relative to the interior of the chamber of the syringe barrel to provide sealing engagement with the sidewall of the syringe barrel; a plunger rod having a first end, a second end, and a rod portion extending therebetween, wherein at least a portion of the rod portion is flexible, wherein the second end of the plunger rod is engaged with the stopper such that movement of the first end of the plunger rod in a first direction moves the stopper in a second direction between a first position in which the stopper is located a first distance from the first end of the syringe barrel, and a second position in which the stopper is located a second distance from the first end of the syringe barrel, the second direction being different than the first direction and the second distance being different than the first distance, and wherein the overall length of the syringe assembly is the same when the stopper is in the first position and the second position; and an actuator flange disposed at least partially about the syringe barrel and movable alongside the syringe barrel, the actuator flange being connected to the first end of the plunger rod, the actuator flange including a finger flange for facilitating manual movement of the actuator flange with respect to the syringe barrel in the first direction to advance the first end of the plunger rod in the first direction and the second end of the plunger rod in the second direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A syringe assembly, comprising:
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a syringe barrel having a first end, a second end, and a sidewall extending therebetween and defining a chamber having an interior; a stopper slidably disposed within the interior of the chamber of the syringe barrel, the stopper sized relative to the interior of the chamber of the syringe barrel to provide sealing engagement with the sidewall of the syringe barrel; a plunger rod having a first end, a second end, and a rod portion extending therebetween, wherein at least a portion of the rod portion is flexible, wherein the second end of the plunger rod is engaged with the stopper; a finger flange disposed at least partially about the syringe barrel and associated with the first end of the plunger rod and movable with respect to the syringe barrel wherein upon application of a manual force by the application of a squeezing movement between the finger flange and the first end of the syringe barrel causes the stopper to move between a first position in which the stopper is located a first distance from the first end of the syringe barrel, and a second position in which the stopper is located a second distance from the first end of the syringe barrel, the second direction being different than the first direction and the second distance being different than the first distance, and wherein the overall length of the syringe assembly is the same when the stopper is in the first position and the second position; and wherein at least a portion of the syringe assembly is encapsulated by a packaging element. - View Dependent Claims (16, 17, 18, 19)
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Specification