Toroid (geometry)

Toroid (geometry)

(For other uses of this term, see Toroid disambiguation page.)

In mathematics, a toroid is a doughnut-shaped object, such as an O-ring. The surface of such an object is known as a torus. Its annular shape is generated by revolving a circle around an axis external to the circle.

Patents

* "Toroidal shaped closed chamber whistle". February 7, 1984.
* "Toroidal whistle". August 18, 1987.


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