Storage tank shutoff valve
US5472012A · kind A · utility
32Cited by
14References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 14, 1994 |
| Grant date | Dec 5, 1995 |
| Priority date | — |
| Expiry date | Jan 14, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7478
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A valve assembly for automatically shutting off the flow of a pressurized liquid to a storage tank includes a cam that is rotated in response to the level of a liquid in the storage tank. A follower moves a poppet valve axially with a housing as a nonlinear function of rate of cam rotation. The poppet valve is moved to a closed position to terminate flow of a liquid to the storage tank whenever the liquid level within the storage tank reaches a predetermined level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.