Relief valve with overturn surge control for storage tank
US5048553A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 9, 1990 |
| Grant date | Sep 17, 1991 |
| Priority date | — |
| Expiry date | Nov 9, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7851
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A tank valve apparatus including a sealed piston assembly for regulating movement of a spring biased poppet, the poppet being in cooperative engagement with the sealed piston assembly and a valve seat of an associated valve opening, the valve opening being in communication with ambient atmosphere and pressure within the tank so that the poppet can be activated by a predetermined pressure developed within the tank to overcome the spring bias and vent the pressure to ambient atmosphere. The piston assembly includes a piston head and a flow path through the piston head for flow of material therethrough within a closed piston chamber which encloses the piston head. A snubber valve assembly is included which is carried by the piston head and contained within the closed piston chamber. The snubber valve assembly includes a shut-off disc for momentarily closing the flow path of the piston head during initial overturn of the tank thereby momentarily preventing movement of the piston head within the chamber which in turn restricts movement of the poppet and prevents venting of any surge pressure built up within the tank during the overturn. The snubber valve assembly also includes a member …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.