Hydrodynamic slitted seal and method of manufacture thereof
US4497496A · kind A · utility
20Cited by
6References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 23, 1984 |
| Grant date | Feb 5, 1985 |
| Priority date | — |
| Expiry date | Apr 23, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49798
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.