Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Bridges
Reexamination Certificate
2000-04-06
2001-07-10
Mai, Huy (Department: 2873)
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Bridges
C351S063000
Reexamination Certificate
active
06257720
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to eyeglasses, and more particularly to eyeglasses wherein the eyeglasses are rotatable at the bridge portion, thereby allowing the lenses and the earpieces to be rotated thereby upon each other. The side pieces rotate to protect the lenses when the side pieces are in their folded state and the eyeglasses are rotated. A side piece which is attached at the temple turns together with one of the glasses with the result that both of the side pieces will be disposed over both of the glasses at both sides thereof.
2. The Prior Art
U.S. Pat. No. 3,936,165—Nosaki shows a bridge having a shaft extending therethrough. Surrounding the shaft is a spring which provides a force between a connecting portion and a main body. The spring is held in a continuous compressed state so that it imposes a constant bias pulling the connecting portion towards the main portion.
In this design, the shaft is pinned to the connecting portion. This prevents rotation of the shaft with respect to the connecting portion, and withdrawal of the shaft from the connecting portion. The spring around the shaft fits against a flange at the head end of the shaft and against an annular wall within the bridge. There is no washer between the annular wall and the end of the spring.
BRIEF SUMMARY OF THE INVENTION
An object of this invention is to provide eyeglasses having a mechanism for turning one of the glasses around so that the side piece attached thereto also turns together with one glass, resulting in the protection of both of the glasses at both sides by the attached side pieces which are disposed over the glasses on both sides so as to dispense with a protective case.
Another object is to secure the connecting portion to the shaft by means of a screw and thread connection which can be tightened in order to prevent loosening of the screw during repeated use by the eyeglass wearer.
Another objective of the invention is to provide at least one washer at one end of the spring surrounding the shaft. These washers provide additional ease of movement or rotation between the connecting portion and the main body portion, thereby preventing excess torque from being applied to the threaded connection between the connecting portion and the threads on the shaft which could cause the threads on the shaft to disengage from the connecting portion.
REFERENCES:
patent: 2285615 (1942-06-01), Ruchser
patent: 3880503 (1975-04-01), Uribe
patent: 3936165 (1976-02-01), Nosaka
patent: 4367929 (1983-01-01), Fortini
Mai Huy
Mitani USA, Inc.
Snider Ronald R.
Snider & Associates
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