Seal for a joint or juncture – Seal between relatively movable parts – Piston ring or piston ring expander or seat therefor
Patent
1997-07-14
1999-08-10
Green, Brian K.
Seal for a joint or juncture
Seal between relatively movable parts
Piston ring or piston ring expander or seat therefor
277498, F02F 500, F16J 900, F16J 920
Patent
active
059346850
ABSTRACT:
A piston ring seal having stepped ends with feathered edges to minimize ring expander wear in high pressure hydraulic applications. The ring seal is circumferential and comprises a resilient material surrounding a longitudinal axis having width extending from an inner diameter to an outer diameter, and a depth extending parallel to said axis. The ring seal has a pair of apposed, overlapping, stepped ends. Each stepped end includes a circumferentially-extended portion and a circumferentially-recessed portion, each circumferentially-extended portion of one end being received by the apposed, circumferentially-recessed portion of the opposite end. In a preferred embodiment, a first pair of apposed circumferentially-extended and circumferentially-recessed portions are each feathered, starting in a first circumferential direction at the inner diameter, through a circular quarter-turn toward a radial direction cut through to the outer diameter; a second pair of apposed, circumferentially-extended and circumferentially recessed portions are also feathered in the same manner, but starting at the inner diameter in an opposite circumferential direction. A method for making the ring seal is also disclosed.
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Coyne Brian J.
Dolce Marcus
Green Brian K.
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