Back-up rings for high pressure seals, packing assembly, and pumps incorporating same
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United States of America Patent
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Aug 3, 2004
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N/A
app pub date -
Dec 14, 2001
filing date -
Dec 14, 2001
priority date (Note) -
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Abstract
An improved support for a seal is provided in the form of a back-up ring that reduces or eliminates the gaps between a pump plunger and a high pressure cylinder of a pump. The support includes a back-up ring having opposed first and second faces with a wall thickness disposed between the faces. The back-up ring includes a frustro-conical concave surface on the first face and a frustro-conical convex surface on the second face. Also provided are a packing assembly including at least one back-up ring and a reciprocating pump incorporating the at least one back-up ring.
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