Patent 7153202 was granted and assigned to Bettcher Industries on December, 2006 by the United States Patent and Trademark Office.
Helical members applied in flexshaft assemblies for retaining lubricant inside a flexshaft casing 22. The helical members have a helix that is opposite of a helix of wires that make up a flexible drive member. The helical members direct the lubricant away from an end of the flexshaft assembly that the helix of wires tends to direct the lubricant toward.