World’s fastest length change!
By pivoting an upper rail into the bar, Excalibar I™ is created. Without tools, this provides the world's fastest sprocket and length change.
Excalibar I™ can permit unique designs for product differentiation. This can provide higher profit margins as well as increased part sales. A visual indicator alerts the user to buy new parts. Replacement of parts will no longer be a guessing game.
Patent text (US Patents 6,944,958 and 7,412,769) can be found at http://patft.uspto.gov/
The upper rail can be replaced by an extended one for a 'tool free' length change to create Excalibar I Plus™. If only a new sprocket is needed, the rail is replaced.