Patent Application
20050102805
1. Field of the Invention
This invention relates to a buckle having a portion integrally formed of a screen, to decrease the weight of the buckle without decreasing its strength and durability.
2. The Prior Art
It is often a goal in the manufacture of buckles to decrease the weight of the buckle without compromising its strength. One such buckle is shown in U.S. Pat. No. 5,926,928 to Lundstedt, which shows a typical side-release type buckle having a plurality of vents on both the upper and lower faces of the female component of the buckle. The vents both reduce the weight and allow air flow through the buckle.
A disadvantage of this type of buckle, however, is that the vents compromise the integrity of the buckle, and reduce its strength and durability. Repeated tension on the female portion makes this portion more susceptible to failure due to the vents.
It is therefore an object of the invention to provide a buckle that is reduced in weight and yet does not have any reduction in strength and durability from similar type buckles.
It is another object of the invention to provide such a buckle that is simple and inexpensive to manufacture, as well as attractive in appearance.
These and other objects are achieved with a buckle according to the invention, which comprises a male portion and a female portion, the female portion having a top face, a bottom face and a cavity for accepting the male portion. The male portion is adapted to snap into the female portion to lock the two portions of the buckle together. At least one face of the female portion is formed from a screen made of the same material as the rest of the female portion and having a thickness that is less than a thickness of the female portion. The screen is made from a plurality of crossed bars, defining a set of substantially uniformly spaced holes between the bars.
In a preferred embodiment, there is a rib disposed along an underside at least one of the faces. The rib extends across the screen to support the portion of the buckle containing the screen. Most preferably, there are two ribs disposed on an underside of each of the top and bottom faces, said ribs facing each other and extending in a longitudinal direction, and acting as a guide for the male portion when the male portion is inserted into the female portion.
The screen is preferably surrounded by an additional rib having a thickness greater than the thickness of the face containing the screen. This adds additional strength to the buckle without measurably increasing its weight.
There is preferably at least one strap attachment bar connected to at least one of the male portion and female portion, to connect the buckle to a strap.
In a preferred embodiment, the buckle is a side-release type buckle, with the male portion having two release tabs that snap into two locking slots on the female portion to lock the male portion to the female portion, and wherein pressing the release tabs causes the male portion to be ejected from the female portion. However, other types of buckles, such as center-push buckles could also be used.
By having a screen in the female portion, the weight of the buckle can be decreased by as much as 15-20%. This increases user comfort while decreasing the manufacturing cost, because less plastic is required.
Other objects and features of the present invention will become apparent from the following detailed description considered in connection with the accompanying drawings. It is to be understood, however, that the drawings are designed as an illustration only and not as a definition of the limits of the invention.
In the drawings, wherein similar reference characters denote similar elements throughout the several views:
Referring now in detail to the drawings and, in particular,
The top and bottom surfaces of female portion 10 have a section of screen 11. As shown in
Screen 11 is formed from a plurality of cross-hatched bars 13, with a plurality of evenly-spaced apertures 14 in between. The buckle according to claim 1, further comprising a rib disposed along an underside of said at least one face, said rib extending across the screen to support the portion of the buckle containing the screen.
As shown in
There is a rib 17 surrounding screen 11. Rib 17 has a thickness greater than the thickness of screen 11 and lends additional support to screen 11 so that buckle 1 has sufficient strength and durability. Female portion 10 is integrally molded in one piece, preferably from a rigid, durable plastic material, such as polyethylene or acetal resin.
As can be seen from
In buckle 1, there are strap attachment bars 19, 21 and 22 on the female and male portions, respectively, to attach buckle 1 to a variety of straps.
Buckle 1 is a typical side-release type buckle, with male portion 20 having two release tabs 25 that snap into two locking slots 18 on female portion 10 to lock male portion 20 to female portion 10. Pressing release tabs 25 causes male portion 20 to be ejected from female portion 10. Alternatively a different type of buckle could have a screen portion, such as a single-piece buckle, or a center push buckle. In buckle 10, screen 11 is disposed on both the top and bottom faces of female portion 10. However, screen 11 could also be located on a single face as well.
Accordingly, while only a single embodiment of the present invention have been shown and described, it is obvious that many changes and modifications may be made thereunto without departing from the spirit and scope of the invention.
