Introduction

Coned disk springs, also known as Belleville Springs, have a long history. In 1835, one Timothy Hackworth, in England, received acknowledgment for an application in a safety valve. A Frenchman, Julian F.Belleville, secured a British patent in the 1860's for a particular application. AT that time, these springs were mainly used in the buffer parts of railway rolling stock and for recoil mechanisms of guns, etc.

Whenever space is limited, particularly in the presence of high forces, the use of coned disk springs will be of advantage. Linear, regressive, and even progressive load-deflection characteristics can be obtained by varying the basic dimensions or by stacking. A large number of standard of-the-shelf sizes is available, so that custom sizes may not be required.

For these reasons, coned disk springs are used today in virtually all branches of engineering with new applications surfacing all the time.

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