Belt tensioner and method for making a belt-tensioner arm and a spring case
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United States of America Patent
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Jul 2, 2013
Grant Date -
Jan 1, 2009
app pub date -
Sep 11, 2008
filing date -
Nov 5, 2004
priority date (Note) -
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Abstract
A belt tensioner includes an arm, a spring case, and a helical spring having inwardly projecting first and second end portions. Another belt tensioner includes a spring, an arm, a spring case, and a pivot bushing surrounding the spring. An additional belt tensioner includes an idler pulley having a bearing with a mounting hole and includes an arm having a post. The post is positioned in the mounting hole, and an annular rim of the post is deformed radially outward and over the bearing. A method for manufacturing an arm and a spring case of a belt-tensioner includes obtaining a belt-tensioner-arm casting mold including a first section and a second section and obtaining a belt-tensioner-spring-case casting mold including a first segment and a second segment.
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