Restrictor valve for a metered liquid dispensing system
US5234017A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1991 |
| Grant date | Aug 10, 1993 |
| Priority date | — |
| Expiry date | Oct 7, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8242
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A restrictor valve functions as an outlet valve in a metered liquid dispensing system and utilizes a spring biased, shiftable anti-siphon check valve to prevent fluid flow back from the receiving tank into the system. The restrictor valve is attached to the delivery end of the system discharge hose. The dispensing system is controlled by a central electronic unit and the restrictor valve includes a sensing unit for signalling the electronic control when liquid is present at the outlet. The restrictor valve is connected to the receiving tank by a low spill coupling to minimize escape of the liquid into the environment. The restrictor valve may also include a vacuum breaker valve which admits air into the discharge hose when the system pump is run in reverse to remove the prime from the discharge hose.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.