US 12,257,146 B2
Injector assembly for inserting an intraocular lens
Thorben Badur, Oberkochen (DE)
Assigned to Carl Zeiss Meditec AG, Jena (DE)
Filed by Carl Zeiss Meditec AG, Jena (DE)
Filed on Jul. 27, 2022, as Appl. No. 17/875,142.
Application 17/875,142 is a continuation of application No. PCT/US2020/015193, filed on Jan. 27, 2020.
Prior Publication US 2022/0362008 A1, Nov. 17, 2022
Int. Cl. A61F 2/16 (2006.01)
CPC A61F 2/167 (2013.01) [A61F 2/1675 (2013.01); A61F 2/1678 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An ophthalmosurgical injector, comprising:
a cannula;
a barrel;
an outer plunger mounted in the barrel in a longitudinally displaceable manner and together with the barrel delimiting a barrel cavity arranged in the barrel, and into which an intraocular lens can be introduced; and
an inner plunger mounted in the outer plunger in the longitudinally displaceable manner and together with the outer plunger delimiting an outer plunger cavity arranged in the outer plunger, and into which a liquid can be introduced,
wherein the ophthalmosurgical injector is configured such that a first movement, executed by the inner plunger relative to the outer plunger such that the outer plunger cavity becomes smaller, causes the liquid to flow from the outer plunger cavity into the barrel cavity via an opening arranged in the outer plunger, and a second movement, executed by the outer plunger relative to the barrel such that the barrel cavity becomes smaller, causes the intraocular lens to be pressed out of the barrel cavity and into the cannula,
wherein the outer plunger has, at an end of the outer plunger delimiting the barrel cavity, a cushion which is configured to contact the intraocular lens during the second movement,
wherein the cushion is softer than other portions of the outer plunger,
wherein a rigid channel is formed in the cushion, and
wherein the rigid channel allows the liquid from the barrel cavity to flow in a direction away from the cannula.