Liquid spring, vehicle suspension system and method for producing a low variance in natural frequency over a predetermined load range
US3947004A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1974 |
| Grant date | Mar 30, 1976 |
| Priority date | — |
| Expiry date | Dec 23, 1994 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/067
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
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 pred…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.