Sliding element

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

Reexamination Certificate

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Details

C277S400000

Reexamination Certificate

active

11017098

ABSTRACT:
A primary objective of a sliding element of the present invention is to decrease a friction coefficient of the sliding face and to improve seal performance thereof. The sliding element comprises a first dam section (6) which is configured in an annular form on the sliding face (2), a second dimple section (3A) which has a form of a narrow groove and makes an inclination angle (β) being measured from the dam section (6) in a direction of rotation pointing toward the sealed fluid, a suction means (3) which includes an annularly arranged array of the second dimple sections (3A), a first dimple section (4A) which has a form of a narrow groove and makes an inclination angle (α) being measured from the dam section (6) in a direction of rotation pointing an opposite direction relative to the suction means (3), a discharge means (4) which includes an annularly arranged array of the first dimple sections (4A), and a seal face (7) which is disposed in a peripheral surface adjacent to the discharge means (4) and in the opposite side relative to the dam section (6).

REFERENCES:
patent: 3109658 (1963-11-01), Barrett et al.
patent: 4645414 (1987-02-01), DeHart et al.
patent: 5092612 (1992-03-01), Victor et al.
patent: 5664787 (1997-09-01), Fuse et al.
patent: 6142478 (2000-11-01), Pecht et al.
patent: 6152452 (2000-11-01), Wang
patent: 6705844 (2004-03-01), Englander
patent: 6902168 (2005-06-01), Tejima

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