Liquid spring, vehicle suspension system and method for producin

Spring devices – Vehicle – Comprising compressible fluid

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F16F 500

Patent

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039470040

ABSTRACT:
A method of obtaining a low variance in suspension frequency of an object including the steps of establishing the natural frequency which is desired, calculating the varying spring rate required to maintain the desired suspension frequency throughout a predetermined load range, selecting a compressible fluid having a varying rate of compressibility which approaches the desired calculated varying spring rate, and utilizing a spring constructed with said compressible fluid to support said object. A vehicle suspension system comprising in combination a vehicle body for functioning over a predetermined load range and a spring suspension having a low variance in natural frequency over said predetermined load range comprising a housing, a piston in said housing, a compressible fluid having a varying compressibility in said housing with the rate of change of the compressibility of the compressible fluid being matched to a varying spring rate which will produce said low variance. A liquid spring including a housing, piston means in said housing, and liquid means in said housing having a predetermined varying spring rate which will produce a predetermined natural frequency range over a predetermined load range.

REFERENCES:
patent: 2873963 (1959-02-01), Taylor
patent: 2909368 (1959-10-01), Taylor
patent: 3218051 (1965-11-01), Doetsch

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