Mechanical end face seal with ultrahard face material
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United States of America Patent
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Sep 14, 2010
Grant Date -
Nov 22, 2007
app pub date -
May 16, 2006
filing date -
May 16, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An end face seal having two thin, opposed faces of a composite PDC/tungsten carbide or like material for example of a thickness of from about 2 to 5 mm to about 10 to 15 mm, brazed or adhesively adhered by an epoxy resin to a substrate of tungsten carbide or silicon carbide/nitride formed in a ring shape. Thereafter, the PDC layer is finish lapped to a flatness of about 1 to about 10 helium lightbands, with a rough lapping to 3 or 4 helium lightbands, and a finish lapping of about 1 helium lightband.
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