Patent classifications
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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F16
ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
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F16F
SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
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F16F1/36
made of rubber or other material having high internal friction,; e.g. thermoplastic elastomers
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F16F1/371
characterised by inserts or auxiliary extension; or exterior; elements, e.g. for rigidification
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F16F1/3713
with external elements passively influencing spring stiffness, e.g. rings or hoops
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