DRAIN BOLT
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United States of America Patent
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N/A
Issued Date -
N/A
app pub date -
Aug 23, 2007
filing date -
Dec 5, 2006
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A drain bolt which includes a threaded shank portion, a driving head, and an enlarged primary flange and a pair of secondary circular flanges of reduced diameter with respect to said enlarged flange, said reduced diameter flanges holding a captive O-ring between them. The seal is between a cylindrical counterbore and the O-ring, and is completely independent of the force with which the drain bolt is installed. In other embodiments, there is a drain bolt with a captured washer, allowing limited movement of the washer, and in another embodiment, the drain bolt is coined just below the O-ring.
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