Asymmetrical combined cylindrical and conical springs

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United States of America Patent

PATENT NO 9161634
APP PUB NO 20090106908A1
SERIAL NO

11978869

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Abstract

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A mattress comprising asymmetrical coil springs with nonlinear spring rates provides comfort to users with different weights. The lower portion of the spring is cylindrical and the upper portion is conical or frustoconical. This arrangement causes the spring to undergo linear compression before undergoing nonlinear compression. The result is a mattress that is sufficiently soft for lighter users and sufficiently firm for heavier users.

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Patent Owner(s)

  • DREAMWELL, LTD.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
DeFranks, Michael S Decatur, US 71 1027
Lynn, Jeremy Newnan, US 2 27

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