Inherently effectively damped coiled spring

Spring devices – Coil – Plural – one within another

Patent

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Details

267 9B, 267 61R, 267179, F16F 302

Patent

active

046405003

ABSTRACT:
The present invention relates to an improved inherently effectively damped coiled spring construction including a first coiled spring having a pair of ends, and a second coiled spring having a pair of ends, the second coiled spring being in the form of at least one tubular spring, the body of which is disposed about the body of the first coiled spring in operable contact therewith to provide the desired friction therebetween and whose ends are not contiguous with the ends of the first coiled spring and are free of contact with the weight imposed on the first spring and the support of the first spring so that when the first spring is dynamically compressed or expanded, relative twisting movement of the springs is made possible immediately following yielding of static friction force along their contacts, whereby the second spring disengages from the further twisting movement of the temporarily deformed coils of the first spring, thereby creating an effective friction generating and energy dissipating device for the first spring, thereby damping the relative movement of the first spring. Additional concentric tubular springs may be combined with the first and second springs to selectively provide the desired amount of damping action.

REFERENCES:
patent: 1938099 (1933-12-01), Endsley
patent: 2101721 (1937-12-01), Scharfenberg
patent: 2136908 (1938-11-01), Pierce et al.
patent: 2183100 (1939-12-01), Holland
patent: 2243217 (1941-05-01), Lorini

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