Eyeglass devices with removable supplemental lens

Details Eyeglass devices with removable supplemental lens Eyeglass devices with removable supplemental lens

2000-05-10

2001-05-22

Dang, Hung Xuan (Department: 2873)

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

With antiglare or shading

C351S057000

Reexamination Certificate

active

06234627

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to ophthalmic devices, namely mounting arrangements for removable eyeglass lenses and sunglass lenses, together with eyeglass frames for supporting such removable lenses.
BACKGROUND OF THE INVENTION
This invention relates generally to eyewear, and more particularly to clip-on sunglasses or other lenses which are intended to be mounted on a pair of glasses or sunglasses, and the eyeglass frames for mounting of such lenses. In presently known lens mounting arrangements, lenses, usually light filtering lenses, are mounted onto an eyeglass frame by means of clamping mechanisms on the lenses. Moffitt, Jr., U.S. Pat. No. 4,451,127 discloses such clip-on sunglasses.
In other lens mounting arrangements, the lens is mounted into an eyeglass frame by means of a “tongue and groove” connection between the lens and the interior of the eyeglass frame. Such configurations are described in U.S. Pat. Nos. 4,730,915, 4,824,233, and 4,674,851, all to Jannard and U.S. Pat. No. 4,021,103 to Gaspari.
There is a need for detachable light filtering or protective lens system which presents an attractive appearance when assembled, while enabling the easy attachment and removal of the “clip-on” lens.
An object of the present invention is to provide a mounting structure for light filtering or protective lenses and other lenses atop eyeglass and sunglass frames. A further object of the invention is to provide ease of attachment and detachment of the mounted lenses atop the eyeglass or sunglass frames. Yet a further object of the invention is to provide an eyeglass frame plus clip-on lens assembly which has an attractive appearance and which is easily manufactured.
OBJECTS AND SUMMARY OF THE INVENTION
The objects of the invention can be realized with a flexible unitary transparent lens extending the length and width of an eyeglass frame and having notches on the outer perimeter of the lens which are complementary to tabbed projections mounted on the eyeglass frame. The unitary lens of the invention is mounted on the eyeglass frame by placing the lens over the eyeglass frame with the notches in the lens positioned over the tabbed projections on the outer perimeter of the eyeglass frame and then flexing the lens to insert it behind the tabbed projections on the frame. When the flex in the lens is released, it slides behind the tabbed projections and is held to the frame. The lens is secured to the frame by means of the engagement of the notches with the tabbed projections on the perimeter of the eyeglass frame.


REFERENCES:
patent: 3884561 (1975-05-01), Kodys

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