Stuffing box lubricator
US5305854A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 20, 1991 |
| Grant date | Apr 26, 1994 |
| Priority date | — |
| Expiry date | Sep 20, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16N11/04
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Apparatus for lubricating pistons having a pressure metered lubrication reservoir in fluid flow attachment with the piston through a lantern port in the wall of the stuffing box surrounding the piston. A check valve in fluid flow alignment between the stuffing box and the lubrication reservoir prevents the flow of spent hydraulic fluid from the stuffing box into the lubrication reservoir in the event of a seal leak or failure. A safety valve having a higher trigger pressure than the pressure of the lubricant flowing from the reservoir to the stuffing box and being in fluid flow alignment with the stuffing box and lubrication reservoir prevents the escape of lubricant flowing from the reservoir to the stuffing box, but allows the escape of spent hydraulic fluid in the event of a seal leak or failure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.