Grooved pumping seal
US6149161A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1998 |
| Grant date | Nov 21, 2000 |
| Priority date | — |
| Expiry date | Apr 14, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2370/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An improved seal for a hydrodynamic bearing which aids in making the bearing less sensitive to changes in load and rotational speed, which is especially useful in hydrodynamic bearing motor in which the bearing is open at both the upper and lower ends. Additionally, a hydrodynamic bearing open at both ends in which the balance of fluid flow or pressure within the total system is maintained, and a seal usable to make a hydrodynamic bearing which is as stiff or stiffer than known standard spindle motors with hydrodynamic bearings which are supported only at one end. Also, a pumping seal useful in a hydrodynamic bearing design to maintain balanced internal fluid pressures during operation to minimize the likelihood of any lubricating fluid being lost during operation is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.