Hydrodynamic seal with improved extrusion abrasion and twist resistance
US6382634B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 2000 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Apr 26, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3244
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydrodynamically lubricating seal has a generally circular seal body defining a static sealing surface and having a dynamic sealing lip projecting from the seal body and defining a dynamic sealing surface, a non-hydrodynamic edge and a non-circular angulated flank having a flank angle. The flank angle and the dynamic sealing surface have theoretical intersection being positioned from the non-hydrodynamic edge by a variable distance having a minimum dimension being greater than {fraction (1/16)} inch and also having a maximum dimension. The circular seal body defines a theoretical center-line and, when viewed in a longitudinal cross-section taken along the theoretical center-line, a hydrodynamic inlet curve is shown that blends the theoretical intersection between the flank angle and the dynamic sealing surface. This hydrodynamic inlet curve is tangent to the dynamic sealing surface at a location of tangency and has a rate of curvature less than the rate of curvature of a ⅛ inch radius.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.