Positive drive compensating shaft seal
US5409241A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1993 |
| Grant date | Apr 25, 1995 |
| Priority date | — |
| Expiry date | Jul 14, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/24
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A compensating positive drive rotary shaft seal assembly comprises a two-part housing, each housing part including a radially directed stator surface surrounding the shaft. A collar is keyed to the shaft between the stators, and an axially shiftable rotor is interposed between the collar and each stator. The rotors are positively coupled to the collar for rotation with the shaft. An elastomeric annular seal is mounted on the shaft between each rotor and the collar. The housing parts are axially shiftable toward and away from each other adjustably to compress the elastomeric seals and yieldably bias the rotors against the stators. An internal annular gasket spanning the housing parts encompasses the seal assembly and defines a sealed chamber coupled to one or more purge ducts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.