Double truncoconical spring of wire with circular cross section

Details Double truncoconical spring of wire with circular cross section Double truncoconical spring of wire with circular cross section

1973-03-30

1978-10-17

Marbert, James B.

Spring devices

Vehicle

Comprising compressible fluid

F16F 104

Patent

active

041204891

ABSTRACT:
A double truncoconical spring of wire having a circular cross section, said spring having a coil diameter which is greatest in the middle portion of the spring and in which, under maximum load the coils of one half of the spring lie inside one another in the form of a spiral, and which has a linear or partially linear and partially progressive characteristic, said double truncoconical spring constructed of wire having a diameter which is greatest in the middle portion of the spring which diameter diminishes towards both ends of the spring, diminishing in a ratio such that the condition of maximum stress is fulfilled for each coil and in the case of a partially progressive characteristic, as loading upon the spring increases, the inner coils position themselves against the bearing surfaces at the ends of the spring.

REFERENCES:
patent: 176174 (1876-04-01), French
patent: 380651 (1888-04-01), Fowler et al.
patent: 1234636 (1917-07-01), Craven
patent: 1751261 (1930-03-01), Wilson

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