eyeglass frame for removal and insertion of lenses

Details eyeglass frame for removal and insertion of lenses eyeglass frame for removal and insertion of lenses

2000-03-30

2001-08-14

Dang, Hung Xuan (Department: 2873)

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Split rim mounting

C351S090000

Reexamination Certificate

active

06273564

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an eyeglass frame, in particular it relates to an eyeglass frame where at least a portion of the frame can be removably coupled to the body of the frame to permit the removal and replacement of the lenses in the frame.
2. The Prior Art
The prior art teaches a number of eyeglass frames. For example, the U.S. Pat. No. 3,826,564 to Werling has a hinge mechanism and a clasp mechanism. The clasp and hinge mechanisms are cumbersome, conspicuously visible, and aesthetically displeasing. The frame can be opened up to permit the lenses to be removed. Similarly the U.S. Pat. No. 2,479,754 to Marks discloses a frame that permits the lenses to be removed. As shown in FIG. 1 of Marks', the frame has a hinge base 16 with a stud 17 that goes through the top portion 14. Hinge screw 16 provides a pivot for a portion at the temple.
All of the prior art proposals are both cumbersome and aesthetically inappropriate for today's eyeglass frames, notably designer frames, which are primarily meant to be aesthetically pleasing. It would, therefore, be most desirable to provide a lens frame which would permit lenses to be removed, while at the same time requiring a minimum amount of disassembly and reassembly on the part of the wearer and also an insignificant amount of clasping or hinge mechanisms on the frame itself, which would add unnecessary weight to the frame and also would be unattractively visible on the frame when worn by the wearer.
SUMMARY OF THE INVENTION
It is a principle object of the invention to provide an aesthetically pleasing, simple mechanism which permits the frame to be opened and for lenses to be removed and replaced. Such an invention will permit new lenses to be inserted when the old lenses become scratched or a new prescription is required. In addition, lenses to be used in the outdoors, such as prescription sunglass lenses or tinted lenses can be inserted and the same frame can be utilized.
It is a further object of the invention to provide an invention which can be used for both metal frames as well as for plastic eyeglass frames.
It is a further object of the invention to provide another embodiment utilizing a cam to facilitate the opening and closing of the frame and an alignment pin and alignment recess to align the upper and bottom portions of the frame during opening and closing of the frame.
It is yet another object of the invention to provide a mechanism for restricting the amount of movement by which the frame can be opened to prevent the lenses from accidentally falling out of the frame while either being opened or in the fully opened position by limiting the degree to which the frame opens and providing guide means in the form of a slot and a journey pin traveling within the slot and to ensure that the frame is closed flush in the closed position.
Other objects will become known from the following drawings and description.


REFERENCES:
patent: 2754724 (1956-07-01), Fishman
patent: 5914767 (1999-06-01), Wedeck et al.

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