Self-tightening snow chain and methods of use
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United States of America Patent
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Dec 4, 2012
Grant Date -
Aug 18, 2011
app pub date -
Apr 28, 2011
filing date -
Feb 2, 2006
priority date (Note) -
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Abstract
Self-tensioning snow chain for attachment to a vehicle wheel. The self-tensioning snow chain includes a chain and a tensioning device including a housing having a top including a set of housing teeth, a bottom and at least one aperture defined by the top and the bottom when joined together; a lever interconnected to the housing; a cord; a ratchet spool having a set of ratchet teeth on an upper surface, the ratchet teeth mate with the housing teeth, an under surface and a channel between the upper and under surfaces to receive the cord that is interconnected with the ratchet spool; a tension spring interconnected with the ratchet spool that places a bias on the ratchet spool toward a wind-up direction; and a wave spring positioned between a top surface of the bottom of the housing and the under surface to bias the ratchet spool towards the housing teeth.
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