Mechanical seal
US4558873A · kind A · utility
Inventor
Key dates
| Filing date | Aug 1, 1983 |
| Grant date | Dec 17, 1985 |
| Priority date | — |
| Expiry date | Aug 1, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3472
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A mechanical seal for pumps utilized in harsh environments such as coal/oil slurries or the like, where an annular head assembly is disposed in an annular recess in the pump housing, through which a rotatable shaft is journalled. A rotor, biased by a spring which is secured to the shaft, is pressed against the annular head assembly portion of the seal. Each component has a non-planar surface which is in rubbing contact with the another, the non-planar surfaces preferably being the shape of a truncated cone, the juncture of the surfaces being disposed within the space defined by the annular recess, to minimize particulate buildup, the non-planar faces permitting self-seating thereof due to misalignment, wear or contamination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.