Bellows self-threading seal
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United States of America Patent
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Aug 12, 1997
Grant Date -
N/A
app pub date -
Aug 30, 1996
filing date -
Aug 30, 1996
priority date (Note) -
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Abstract
A method and apparatus for improving a seal of a pliant tubular member on a cylindrical shaft. The seal is in the form of an articulating seal member positioned on a piston rod of a reciprocating pump and in this invention, is for use in a system that has dual in-line reciprocating pumps. The articulating seal has a tubular end positioned over circumferential grooves on each piston rod of the dual acting piston pump. To provide a tight, intimate seal relationship of the tubular end of the articulating seal with the piston rod, a self-threading member is threaded over the pliant tubular end to crush and deform the pliant tubular end into the circumferential grooves.
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