Saddle Washer
The inventor observed his dining room chairs had tubular metal legs with flat washers to secure the seats and they kept coming loose. This problem is easily solved by using an arching washer. It keeps the items from racking, no more loose seats. This in turn made the inventor realize that a smooth surfaced arching washer is probably best used in an indoor environment. And likewise, an outdoor application with rain, fog, dew, a continuously round smooth object could lead to corrosion. To mitigate, there is a toothed version that allows the contact points to dry, preventing rust/corrosion.
See the Patent Here for technical Information: Saddle/Arching Washers on Google.patent.com



Examples of Where to Use and Arching Washer
For Example: Here are a few ugly sign posts that are typical of signs we see everyday. They are "U channel" and "Square" shaped posts. This type of post is used because of its flat surface and relative cheapness compared to using a much more decorative round post with complicated and expensive hardware. A far superior cylindrical post, that is also much better looking could be used if Arching Washers were implemented, adjoining a round post to a flat sign with strength and durability.



Another Example: Here are two good looking cylindrical stop sign posts that are also common, however the cumbersome and expensive hardware that is used, needlessly increases the cost and complexity of the sign. Using our Arching Washer would simplify and therefor reduce the cost of a good looking sign that is stronger than the typical application above.
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The bracket below shows the complexity of typical applications, while the simple washer in the drawing, gives all the strength without all of the cost due to the simplicity of the manufacturing process. Our Arching Washer hugs the post on the curved side and supports the sign on the flat side.



