Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – With antiglare or shading
Reexamination Certificate
2000-08-10
2001-09-18
Dang, Hung Xuan (Department: 2873)
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
With antiglare or shading
C351S057000
Reexamination Certificate
active
06290353
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to spectacles commonly known as eyeglasses. More particularly, the invention relates to spectacles which are provided with two spaced-apart positioning portions located on the end pieces so as to securely attach matching clip-on lenses to the spectacles by means of the positioning portions.
2. Description of Prior Art
In the conventional sunglasses or spectacles, it is common to use permanent magnets or spring-loaded clips (not shown) as connectors for securely attaching a pair of clip-on sunglass lenses to the frame of the spectacles.
However, owing to the limited adhesive force typically found in the permanent magnets as well as in the spring-loaded clips, it is easy for the clip-on lenses to slip off the frame of the spectacles whenever the user is engaged in violent motions.
SUMMARY OF THE INVENTION
In view of the above-described disadvantage, it is a primary object of the present invention to provide spectacles to which matching clip-on lenses can be easily and securely attached. The spectacles according to the present invention comprise at least a frame, two first positioning portions on the frame, a pair of clip-on lenses, and two second positioning portions on the clip-on lenses. Wherein, the frame is provided with two spaced-apart end pieces and a bridge situated in between the end pieces. The two first positioning portions are each pivotally mounted on a respective end piece of the frame. The clip-on lenses are provided with a center connecting portion for connecting to the bridge of the frame and two spaced-apart second positioning portions for connecting to the two first positioning portions of the frame.
REFERENCES:
patent: 5883688 (1999-03-01), Chao
patent: 6113235 (2000-09-01), Yamamoto
patent: 6116732 (2000-09-01), Xiao
Dang Hung Xuan
Evergreat Optical Ind. Co., LTD
Intellectual Property Solutions, PLLC.
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