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Publication of BE497354ApublicationCriticalpatent/BE497354A/xx
F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
F16F3/00—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic
F16F3/08—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber
F16F3/087—Units comprising several springs made of plastics or the like material
F16F3/0873—Units comprising several springs made of plastics or the like material of the same material or the material not being specified