Hydrodynamic slitted seal and method of manufacture thereof

Details Hydrodynamic slitted seal and method of manufacture thereof Hydrodynamic slitted seal and method of manufacture thereof

1984-04-23

1985-02-05

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 1, 277152, 29417, 291484S, F16J 1532, F16J 1554, B23D 1700, B21D 3900

Patent

active

044974965

ABSTRACT:
An oil seal element and method of manufacture thereof from polytetrafluoroethylene or the like. A tubular billet having concentric inner and outer cylindrical surfaces is provided with a frusto-conical end face. Arcuate slits of varying depth and angle are cut in the end face of the billet at each of a plurality of angularly spaced positions. Indexing of the billet is synchronized with rotation of the slitting tool. A disk of desired thickness having arcuate slits on one of its faces is then sliced from the billet, thereby also facing the billet for the next slitting sequence.

REFERENCES:
patent: 3640542 (1972-02-01), Mowat et al.
patent: 3857156 (1974-12-01), Clark
patent: 3929341 (1975-12-01), Clark
patent: 4118856 (1978-10-01), Bainard et al.
patent: 4450614 (1984-05-01), Repella
patent: 4451050 (1984-05-01), Repella

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