Coil torsion spring mounting cones with groove break and method of mounting
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United States of America Patent
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Apr 4, 1989
Grant Date -
N/A
app pub date -
Aug 21, 1986
filing date -
Aug 21, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention relates to a novel anchor cone and winding cone apparatus and method for mounting a coil torsion spring to an overhead door. Indicia are provided on the cones to assure proper orientation of the cones to the spring and the cone/spring assembly to the overhead door. The winding cone includes arrow indicia to clearly indicate the direction of rotation for the winding cone to increase tension on the coil torsion spring. A groove break is provided in each cone to substantially reduce chafing and wear of the corresponding coil of the coil torsion spring.
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