Spring biased deformable intraocular injecting apparatus

Details Spring biased deformable intraocular injecting apparatus Spring biased deformable intraocular injecting apparatus

1998-11-18

2001-01-16

Dawson, Glenn K. (Department: 3731)

Surgery

Instruments

Means for removing, inserting or aiding in the removal or...

C623S004100, C623S006120

Reexamination Certificate

active

06174315

ABSTRACT:

FIELD OF INVENTION
The present invention is directed to lens injecting apparatus having a spring biased plunger used for the implantation of a deformable intraocular lens. The lens injecting apparatus according to the present invention can have a single component or multi-component design.
BACKGROUND OF THE INVENTION
STAAR Surgical Company of Monrovia, Calif. and STAAR Surgical A.G. of Switzerland have been developing and successfully placing into service intraocular lens injecting apparatus for many years. The use of these intraocular lens injecting apparatus have been widely accepted by Ophthalmic surgeons for implanting deformable type intraocular lenses. In particular, STAAR currently supplies a two (2) component lens injecting apparatus including a titanium or stainless steel lens injecting device and a plastic one-piece cartridge having a lens holding portion connected to a nozzle portion. This design has proved to be particularly successful.
SUMMARY OF THE INVENTION
A first object of the present invention is to provide a lens injecting apparatus with a spring biased plunger.
A second object of the present invention is to provide a one component deformable intraocular lens injecting apparatus with a spring biased plunger.
A third object of the present invention is to provide a multiple component deformable intraocular lens injecting apparatus with a spring biased plunger.
A fourth object of the present invention is to provide a lens injecting apparatus including a deformable intraocular lens injecting device with a spring biased plunger and a separate lens cartridge.
A fifth object of the present invention is to provide a deformable intraocular lens injecting apparatus with a spring biased plunger configured to provide biasing force against forward advance of the plunger.
A sixth object of the present invention is to provide a deformable intraocular lens injecting apparatus with a spring biased plunger configured to provide biasing force against forward advance of the plunger when the plunger is forcing and advancing the deformable intraocular lens through a delivery passageway of the lens injecting apparatus into the eye.
The present invention is directed to a deformable intraocular lens injecting apparatus with a spring biased plunger. A preferred embodiment of the lens injecting apparatus includes a spring biased plunger configured to exert a force on the plunger in an opposite rearward direction relative to the forward direction of advancing the plunger during use of the lens injecting apparatus.
The spring biased plunger of the preferred embodiment of the lens injecting apparatus can be configured to allow the plunger to automatically return to a full rearwardly extended position after a user has implanted the deformable intraocular lens into the eye. For example, in an embodiment configured so that the user's thumb exerts a forwardly directed force on the spring biased plunger, when the user decreases this force the plunger automatically begins to return to its full rearward position by the rearwardly directed force exerted on the plunger by the biasing spring.
The deformable intraocular lens injecting apparatus according to the present invention can be a single component design (i.e. one component when assembled requiring no disassembly for loading and injecting a deformable intraocular lens), or a multiple piece design having separate components for loading the deformable intraocular lens prior to assembly for then injecting the deformable intraocular lens (e.g. separate lens injecting device with lens cartridge receiver plus separate lens cartridge).


REFERENCES:
patent: 834261 (1906-10-01), Chambers
patent: 5304182 (1994-04-01), Rheinish et al.
patent: 5766181 (1998-06-01), Chambers et al.
patent: 5772666 (1998-06-01), Feingold et al.
patent: 5860984 (1999-01-01), Chambers et al.

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