Housings with safety pressure relief means thereon
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United States of America Patent
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Mar 9, 1993
Issued Date -
N/A
app pub date -
May 28, 1991
filing date -
May 8, 1989
priority date (Note) -
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status (Latency Note)
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Abstract
A fastening which allows a bolted-on cap to part from a body when excessive pressures develop in a cavity in the body, comprises a nut and bolt arrangement, and includes a weakened tubular spacer surrounding each bolt, between the bolt head and the cap. The wall of the spacer is drilled or scored in its mid-length area. The material and proportions of the spacer, and the proportions of the score or drilling, are so matched in relation to a particular pressure environment, that on excessive pressure developing, the load exerted on the cap causes the spacer to collapse in controlled manner, rather than merely crushing or breaking.
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