Liquid spring, vehicle suspension system and method for producing a low variance in natural frequency over a predetermined load range
First Claim
1. A method of obtaining a low variance in suspension frequency of an object comprising the steps of establishing the constant natural frequency which is desired, calculating the varying spring rate required to maintain the desired suspension frequency throughout a predetermined load range, selecting spring means having a varying spring rate which approaches the said calculated varying spring rate, and utilizing said spring means for supporting said object.
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Accused Products
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.
42 Citations
11 Claims
- 1. A method of obtaining a low variance in suspension frequency of an object comprising the steps of establishing the constant natural frequency which is desired, calculating the varying spring rate required to maintain the desired suspension frequency throughout a predetermined load range, selecting spring means having a varying spring rate which approaches the said calculated varying spring rate, and utilizing said spring means for supporting said object.
- 5. A vehicle suspension system comprising in combination a vehicle body for functioning over a predetermined load range and a suspension having a low variance in natural frequency over siad predetermined load range comprising housing means, piston means in said housing means, and compressible fluid means having a varying compressibility in said housing means with the rate of change of the compressibility of said compressible fluid means being matched to a varying spring rate which will produce a low variance in said natural frequency.
- 8. A liquid spring for producing a low variance in natural frequency over a predetermined load range comprising housing means, piston means in said housing means, and liquid means in said housing means having a predetermined varying spring rate which will produce a predetermined natural frequency range over a predetermined load range.
Specification