Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Floating or underwater type
Reexamination Certificate
2002-01-25
2002-10-08
Dang, Hung Xuan (Department: 2873)
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Floating or underwater type
C002S428000, C002S430000
Reexamination Certificate
active
06460995
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a diving mask, especially, to providing a lens with wider view field and frame structure.
BACKGROUND OF THE INVENTION
The angle of view field provided by general diving mask with single viewing window (single lens) or double viewing windows (double lenses) is narrower than the ordinary view field of a person. The diving mask with three viewing windows or four viewing windows is commercially available at present (such as M30-M40 produced by TABATA CO. CTD; Hawaii 3 produced by Aqua Lung America, Inc., WM-7302P, WM-7401 produced by UNIDIVE DIVING INDUSTRY CO., LTD etc.), its left and right side viewing windows are viewing windows integrating transparent material with the frame body or inserting two pieces of plane glasses in left and right sides. The diving mask provided by above-mentioned three viewing windows or four viewing windows is practically limited to the “frame edge” (as shown in
FIG. 6
) which is provided between the front viewing window and left-right viewing windows, the view field is influenced, so that the effect is not good.
According to the above-mentioned position, there is a design which is made of curved glass and can provide a wide view field, but which is not popular because the cost of building is too expensive. The glass used as lens must be “tempered glass” which is not easily broken to cause a sharp and dangerous state. Most tempered glasses are planar. When a non-planar state is to be made, it is not only difficult in manufacturing, but also is very expensive and is not adaptable to mass production. Also, problems of quality such as thickness, planeness and transparency are not easily overcome.
SUMMARY OF THE INVENTION
The present invention is a diving mask which can provide a wider view field, and especially relates to its lens structure. A lens providing a front and side view field is connected by glueing “tempered glass” with “tempered glass”, a structure without a longitudinal frame between the front viewing window and the side viewing window of the diving mask is formed by means of the lenses which are connected with a sub-frame, skirt and main frame.
The slope-connection plane for the glued position between above-mentioned glasses is designed with an angle which is parallel (or overlap) with the “line of sight”, which is only a thin line, so that hindrance or influence to the view field is very slight.
The glue for connection between the above-mentioned glasses can be UV silicone glue which can provide not only a good waterproof connection, but also has elastic and flexible properties between the glasses, so that movement through a small angle between two glasses can be made.
The lens structures can be glued by glass which is more than two pieces (such as three pieces or four pieces etc.), when using the above-mentioned constitutional characteristics.
The lens of the diving as can be a single lens with a lens on each left and right side, when using the above-mentioned constitutional characteristics.
The problems of safety, mass production and cost related to the diving mask can be solved because the lens structure provided by the present invention can use “planar” and “tempered glass” as the material, except that it provides a wider view field during diving.
REFERENCES:
patent: 4468819 (1984-09-01), Ohno
patent: 6341863 (2002-01-01), ChenLieh
Dang Hung Xuan
QDS Injection Molding Inc.
Troxell Law Office PLLC
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