Injection syringe for medical purposes
First Claim
1. Injection syringe plunger having means for ensuring at least one flow connection between an interior of a cylinder and outer environment when the plunger is partially inserted into the cylinder,wherein said means comprisea short, substantially cylindrical attachment on the plunger of smaller diameter than the diameter of the plunger in a region of a sealing bead thereon,said attachment comprising at least three, projections mounted on a circumference thereof at a location where said attachment joins the plunger proper, andsaid projections being substantially equidistant from one another and situated at substantially the same level along an axial length of the plunger, and rising above the circumference of said attachment approximately as far as the sealing bead.
1 Assignment
0 Petitions
Accused Products
Abstract
An injection syringe for medical purposes, in which the syringe plunger or a plunger-side end of the syringe cylinder is shaped or provided with components to ensure at least one flow passage or connection between an inner cylindrical space of the cylinder and outer environment, when the plunger is partially, but not completely, introduced into the syringe cylinder.
36 Citations
5 Claims
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1. Injection syringe plunger having means for ensuring at least one flow connection between an interior of a cylinder and outer environment when the plunger is partially inserted into the cylinder,
wherein said means comprise a short, substantially cylindrical attachment on the plunger of smaller diameter than the diameter of the plunger in a region of a sealing bead thereon, said attachment comprising at least three, projections mounted on a circumference thereof at a location where said attachment joins the plunger proper, and said projections being substantially equidistant from one another and situated at substantially the same level along an axial length of the plunger, and rising above the circumference of said attachment approximately as far as the sealing bead.
Specification