Method of making a polytetrafluoroethylene hydrodynamic seal

Details Method of making a polytetrafluoroethylene hydrodynamic seal Method of making a polytetrafluoroethylene hydrodynamic seal

1982-02-19

1984-05-29

Goldberg, Howard N.

Metal working

Method of mechanical manufacture

Obtaining plural product pieces from unitary workpiece

29511, 291484S, B23D 1700, B21D 3900, B21D 5312

Patent

active

044506147

ABSTRACT:
The disclosure relates to a method of manufacturing an oil seal element from polytetrafluoroethylene and the like. A tubular billet having concentric inner and outer cylindrical surfaces is faced off at one end. An arcuate slit is 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: 3857156 (1974-12-01), Clark
patent: 3929341 (1975-12-01), Clark
patent: 4118856 (1978-10-01), Bainard et al.

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