Mechanical seals
US4538821A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 18, 1983 |
| Grant date | Sep 3, 1985 |
| Priority date | — |
| Expiry date | Nov 18, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/348
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A mechanical seal for a shaft (1) existing a housing (12) has an end plate (22) secured to the housing and a sleeve (26) secured to the shaft. The sleeve (26) carries a rotary seal element (40) and the end plate a stationary seal element (52) which form a running seal at faces (48,50). A multipurpose bush (60) is a close fit on the sleeve (26), it positions a spring (64) pressing the seal elements (40,52) together, it caries a lipseal (78) and it prevents collar (30) securing the sleeve (26) to the shaft (10) from contacting the end plate (22) in the event that the sleeve becomes unsecured from the shaft (110). The bush (60) is constructed from spark resistant material. A removable key (88) positions the sleeve (26), and hence the seal elements (40,52) and bush (60) with respect to the end plate (22) prior to tightening sleeve-security screws (32).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.