Water pump seal and method
US4155560A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 23, 1977 |
| Grant date | May 22, 1979 |
| Priority date | — |
| Expiry date | Nov 23, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3244
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An annular shaft seal and method for sealing the shaft of a water pump used with coolants containing anti-corrosion compounds that can precipitate out as particles that can cause wear of shaft and seal. The shaft seal of this invention has a primary sealing element and a unique auxiliary sealing element. The unique auxiliary sealing element has a large lip contact width and is located axially inwardly of the primary sealing element for causing the anti-corrosion compounds to precipitate out at a location axially inwardly from the primary sealing element and over a larger than normal area thus reducing shaft wear due to lower unit loading. The seal also includes means for preventing the precipitated-out particles from reaching the shaft-contacting lip of the primary sealing element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.