Bellows self-threading seal

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member

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Details

277 9, 277212FB, 403 51, 403282, F16J 1552, F16B 718

Patent

active

056557787

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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patent: 5152540 (1992-10-01), Kuze
patent: 5415531 (1995-05-01), Cavanaugh
patent: 5498076 (1996-03-01), Krzywdziak

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