Syringe assembly and syringe stopper
First Claim
1. A syringe stopper made of a resilient material for use in a syringe barrel having a substantially cylindrical body comprising:
- a piston-like stopper body for slidable fluid-tight engagement inside the barrel of the syringe, said stopper body having an outside diameter, a distal end, a proximal end and a longitudinal axis therethrough;
a conically-shaped projection on said distal end of said stopper body and projecting outwardly therefrom, said conically-shaped projection defining a base as it intersects said distal end of stopper body, said base having a base diameter less than said outside diameter of said stopper body to provide an exposed portion of said stopper body between the base of the conically-shaped projection and the distal end the stopper body; and
a plurality of elongated discontinuities running along said conically-shaped projection in the form of raised ribs and continuing past the base of the conically-shaped projection into the exposed portion along the distal end of the stopper body, said raised ribs each having a first end on said conically-shaped projection and extending radially outwardly from the longitudinal axis of the stopper body to a second end disposed past the intersection of said base diameter and said distal end of the stopper body on said exposed portion of the distal end of said stopper body.
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Accused Products
Abstract
A syringe stopper for use in a syringe barrel having a substantially cylindrical body comprises a piston-like stopper body for slidable fluid-tight engagement inside the barrel of the syringe. The body includes a distal end, a proximal end and a longitudinal axis therethrough. A distally directed, conically-shaped projection is positioned on the distal end of the stopper body. At least one elongate discontinuity, running along the conically-shaped projection, is provided. The discontinuity includes a first end on the conically-shaped projection and extends radially outwardly therefrom to a second end, as viewed from the distal end of the stopper. The discontinuity may be in the form of a raised rib or a recessed groove.
165 Citations
21 Claims
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1. A syringe stopper made of a resilient material for use in a syringe barrel having a substantially cylindrical body comprising:
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a piston-like stopper body for slidable fluid-tight engagement inside the barrel of the syringe, said stopper body having an outside diameter, a distal end, a proximal end and a longitudinal axis therethrough; a conically-shaped projection on said distal end of said stopper body and projecting outwardly therefrom, said conically-shaped projection defining a base as it intersects said distal end of stopper body, said base having a base diameter less than said outside diameter of said stopper body to provide an exposed portion of said stopper body between the base of the conically-shaped projection and the distal end the stopper body; and a plurality of elongated discontinuities running along said conically-shaped projection in the form of raised ribs and continuing past the base of the conically-shaped projection into the exposed portion along the distal end of the stopper body, said raised ribs each having a first end on said conically-shaped projection and extending radially outwardly from the longitudinal axis of the stopper body to a second end disposed past the intersection of said base diameter and said distal end of the stopper body on said exposed portion of the distal end of said stopper body. - 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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Specification